Bad Engine Ground Strap Symptoms
A word about positive ground versus negative ground is warranted. Others are mounted to the engine, so the ground strap is connected to both. If you have a Crankshaft Position Sensor Failure, your car engine cannot function efficiently and will eventually fail completely. A vehicle is grounded from the engine block to the frame, from the engine block to the body, from the body to the frame and Of course from the battery ground to the frame. The factory wimped out and only used the harness and a braided ground strap located on the rear, driver's side of the head that then attaches to the firewall. scrub with a toothbrush or something of that nature. Make absolutely sure you have good connections and a fully charged battery, and that for sure there is a solid 12VDC present at the big post on the starter. If your engine won't start, takes too much cranking to start or your engine stalls, you may have a bad fuel pump or you may have a fuel pump wiring issue caused by a corroded connection or ground or a bad fuel pump control module. If I'm not mistaken the strap is the only direct ground link from the engine to the frame, so corrosion at its contact points or loose bolts couldn't help. If the light lights up this way then you have a bad ground strap to the engine and you can try using a jumper cable from the negative terminal of the battery to the block and try to start the car, if this works the it confirms the bad ground strap. When the engine reaches normal operating temperature and/or has been running for more than two minutes, the computer will vary the mixture and monitor the O2 sensor. The ground strap or ground wire is the cable that connects the engine block to the chassis, or sometimes directly to the negative battery terminal. Some of the ground experiences I've had would not lead you to a bad ground. Renix engines are notorious for having bad / faulty ground connections as a result of age and not so great design in the connectors. This is the reference reading. But it does NOT matter where you put them as long as these grounds are put some where on the body, engine and of course to the battery. Buy BMW e90 Battery Cable Negative w/ IBS ground wire NEW oem e91 e92 e93: Batteries - Amazon. Not only does it prevent coolant and oil from mixing; it seals in the internal combustion process. That and you say nothing happens when you turn the key makes it sound like there is a lack of voltage somewhere, possibly a corroded or bad ground cable in the circuit. Coils go bad if the ignition is left on and the engine is not running. Flickering Lights - If your ground strap is damaged or worn out, the electrical circuit will come across resistance while trying to deliver power to the headlights in front of your vehicle. Flickering Lights – If your ground strap is damaged or worn out, the electrical circuit will come across resistance while trying to deliver power to the headlights in front of your vehicle. It can also improve the performance of the radio and lights, in some cases. If one of your CV axles is showing symptoms of being bad or going bad, you will probably see a damaged or torn CV boot when you do the above inspection. It is constructed of high-grade steel and. A poor ground connection will have the same effect on the sensor operation as a bad VRef supply. It is common for the engine ground strap to corrode and fail, causing high resistance in the engine electrical circuit. The ignition coil receives a voltage of 12V from the car's battery and multiplies it to a higher voltage level. Positive circuit is fine (. Top 5 Symptoms of an Engine Immobilizer System Malfunction. Here is a list of the most common signs to check for. The mechanic says that his computer codes are showing that all the o2 sensors are bad. If the ground is good, meter will show battery voltage or the testlight will light. Check cam timing per the service manual. IIRC there is a large one on the side of the motor (towards the front) there is also a smaller ground (that bolts to a pcm mount irrc) that bolts the back of both cylinder heads). Thread starter TurtleCrusher Start date Aug 8, 2009. If it weren’t for the problems with the locking mechanisms, there could be a wide variety of reasons why your engine does not start. Prolonged exposure to road deicing chemicals may cause severe corrosion of the fuel tank straps which secure the tank to the vehicle. - Mustang Monthly. Before I re-assembled the solenoid in its black box I connected all the cables to it and tried to start. A bad oil pump will lose the ability to properly pump oil through your system. The ground point in a boat is the engine block: it is always connected to the battery negative terminal because the starter motor and alternator are in contact with it. This happened a while back and I was able to reset by disconnecting the battery. Connect a ground strap from engine block to the motor case. Extended engine cranking-time is often a symptom of a bad anti drain-back valve in the fuel pump. If the head gasket's seals are weakened or if the gasket head has blown,. Works fine when the truck is new but after 30+ years you'll have all kinds of corrosion on metal parts. autozone codes were multiple cylinder missfires along with 3 tb codes. ) - The trim/tilt doesn't function. Seems like the pcm conrtol relay is bad. autozone codes were multiple cylinder missfires along with 3 tb codes. Pin 20 is the case ground Pin 40 is the power ground Pin 60 is the second power ground The bank-firing speed density computer (your old one) has the injectors wired in two banks, fired off pins 58 and 59. the best way to clean these connections is with baking soda and water. The clue to a bad ground here is that the temp gauge goes up as you add electrical load such as heater, lights and A/C. Updated: I thought my knock sensor was bad (and it still is), turns out I used regular oil rather than synthetic. Why Battery Cable & Ground Strap replacement is so important. Failed Emissions Inspection. I have seen many ground wires that were dust inside. if its cranking over ok, i doubt its an engine grounding issue. I just touch one end of a wire to the maf pipe and the other to the mani at the same time and the car stumbles. On a multi-coil DIS or COP ignition system, it will cause a misfire in only the cylinders supplied by the bad coil. Stumble, Stall, Poor MPG: Bad Engine Ground Connection. With the engine idling, but no electrical accessories on, you can see as high as 13. I'm interested in seeing if there is any other 05 altima owners that have experienced the negative ground cable breaking resulting in other problems such as ignition coils melting at a high rate and computer issues. Be clear that this sensor affects the ignition timing of an engine. They did NOT get grounding from the hood though. Repair Instructions - Engine Ground Strap Replacement - For 2007 Cadillac Escalade - AWD. Customers may have a concern of lack of power and engine light on. Ignition Coils. Re: How To Test Kohler Rectifier ? That's a regulator not a rectifier, and the correct way to test it is to have the engine running. When you have checked all the possible causes listed and you are still experiencing the problem, see your John Deere dealer. A vehicle failed a charging system output test. and I had to use both feet in order to keep the motor running at stop lights. I have seen several issues with this one ground cable in many years, make and model General Motors products. Checked cam shaft positioning sensor. The most common symptom of bad spark plugs is engine's starting troubles. Twenty Reasons Why Your Engine is Overheating In this Truck Radiator guide we are going to go over 20 reasons why your engine may be overheating. In the great majority of cases the unit checks out fine indicating there is something amiss with the vehicle. The engine has it's own, much larger, separate ground. Spark plug failed. Sometimes people look past these common blown head gasket symptoms because they do not want to know they may have a big problem on their hands. Change them with the engine COLD (or you can strip out the plug seats from a hot head), and fit the new ones by hand first before tighting so you don’t cross thread them!. It will not pick up rpms even if petal is on floor. Flexible copper braided connectors (electrical shunts), bonding straps and Storm's new EriFlex compensate for tight bends and offset busbar systems to deliver highly efficient grounding conductivity with minimal resistance. Noise - If you hear excessive fan noise or a roar at all engine speeds. The ground strap is for the oxygen sensor to work properly. There's more than just an uncomfortable feeling when you drive around with bad engine mounts, however. This helps ensurethere is a good ground for the ignition, gauges, and switches. Here are a couple more symptoms of a bad MAP sensor: The check engine light (CEL) will be on with a MAP diagnostic trouble code (DTC) stored in the computer's memory. I mentioned before (which does list the parts) the issue on GMC Canyon/Chevrolet Colorado trucks where the HVAC fans completely stop working for no reason while running. 3 Powerstroke is failing or bad: Your engine starts but throws an intermittent CEL and ODB-II code. Try tracing these wires near the starter harness or near the battery and chances are these ground wire connections are loose. Any voltage is a bad regulator. Also there was an under hood light on the GMT800s through 2002. Check cam timing per the service manual. The second wire harness ground location on the GL500 is this green wire under the rider's seat. Bad Turbo Symptoms. Remove the IDM(both ground strap bolts need to be removed) and shake it, listening for a sloshing sound. Make sure the chassis ground is good too (if the screw is loose, use another hole “giggity”). The more direct grounds the better. If the lights brighten as RPMs pick up, that's even more of a sure sign. Signs of an Auto Ignition Condenser Going Bad. The next problem is caused by all the connections at the grounds. i think at this point am going to get a new one all tho that one is only 4 months old. You headlights will do the same thing as the starter, Dead Battery. 1) Lights Flicker – Flickering headlights and dashboard lights in the vehicle mean your electrical situation is compromised. If they do, you have confirmed that the head gasket is bad, because HC from the combustion chamber of the engine is now getting into the antifreeze. MORE RECALL INFO: When exposed to road salt, the straps can rust and the tank can fall to the ground, causing a fuel leak and possibly a fire. com offers the lowest prices for genuine 2006 Chrysler Town & Country parts. Then you could be driving and all of a sudden experience a stalled engine. In the case of a Porsche (and most other cars other than some old English cars) the negative terminal of the battery is grounded to the body and this connection is continued to the engine with a ground strap. As the fuel pump has not been switched on, the engine cycle cannot be initiated because of absence of fuel. com FREE DELIVERY possible on eligible purchases. if it doesn't slip over the ends, cut the tubing now and slip two pieces per wire. Its one of two conduction paths from the engine back to the battery. Spark plug failed. The Engine Coolant Temperature Sensor (“ECT” for short) is an analog sensor which, as it’s name says, measures the temperature of the coolant and feeds this data to the on-board computer. Sounds like you have a short in your electrical system which occurs when it. This will result in low oil pressure that could lead to further vehicle damage. Checked the engine and house batteries and they both read more than 12. Early symptoms of a failing ignition coil include engine misfires, a jumpy ride and decreased power especially at higher speeds. Different types of fuel pumps will make slightly different sounds. i think we'll just put the mallory unilite back inunfortunately. this is drivning me crazy. Maleficio > Voltage cables can also corrode internally. Engine Bay schematic showing major electrical ground points for 4. How to conect a light switch with black and red wires to knob and tube line? Why no fire coming to the switch no. 2 How Do I Tell If the Starter Solenoid Is Bad on My Kohler Riding Mower Engine? "What Are the Symptoms of a Bad Starter Motor on a Riding Mower Engine?" com/symptoms-bad-starter-motor. Each end terminates in a metal clip. Thank me later!. Re: Bad generator?/Starter? check you ground strap from the engine to the frame, I have had a slow starter for a year but just figured it was an old cart so I never looked at anything. Fouled fuel found in a vehicle tank can usually be linked to a few suspects — it either came from the refinery, the distributor or the filling station down the street from your customer. Best is a sort of ground harness linking everything that matters all the way back to the battery ground strap. If the vehicle has been jump started recently and the cables were connected improperly this can cause a spike in your ECM and cause it to short out. Then I tested the resistance between a bolt on the valve cover and the engine mount. Learn what does U1000 Infiniti CAN Communication Line - Signal Malfunction means, location and how to repair? CAN (Controller Area Network) is a serial communication line for real time application. Get the job done with the right part, at the right price. The engine has it's own, much larger, separate ground. Guys, the ECM is a computer, many things can effect it, the fact of the mater is that if you are going through ECMs, you have another problem, most likely a short in a wire somewhere or a bad ground that is causing the electronics to go bad. To save time and unnecessary worries, if the engine is not running, or is misfiring, check out the ignition system before fiddling with the carburetors. The ignition supplies power to the engine, the gauges and anthing else in that circuit. It is common for the engine ground strap to corrode and fail, causing high resistance in the engine electrical circuit. Think safety all of the time. However, it is still a good idea to run a relatively thick ground strap from the engine to the body, and another from the inner support of the instrument panel to the same point on the body. This is what happens with a bad ground strap. With the engine idling, but no electrical accessories on, you can see as high as 13. In this case, you will experience flickering lights. Somehow the ground strap that is connected to the alternator was cut in half. Where possible, fit an in-line fuel tap to prevent future occurrences. Antifreeze poisoning is a potentially fatal condition that results from the ingestion of ethylene glycol, an organic compound often seen in antifreeze. So if you have info to share, chime in. Drain and refill the oil. There are wild claims about the results from doing this. While I appreciate the responses, I have looked all around within range of the strap, without taking stuff apart, and found nothing. i have a 1953 chevy with a 350 sbc. Disable the ignition or fuel system to prevent the engine from starting during your tests. Engine Ground and Bonding Strap for 12V automotive systems. Either way it will be a good grounding point. If one of your CV axles is showing symptoms of being bad or going bad, you will probably see a damaged or torn CV boot when you do the above inspection. MORGAN 4/4: The Zetec Bad Idle Guide The Zetec is a pretty reliable engine and can last well in excess of 150,000 miles. PVC gases will effectively lower the octane content of. There's also a ground wire between the rear of the engine block and the firewall, where the dogleg engine support is attached. How to conect a light switch with black and red wires to knob and tube line? Why no fire coming to the switch no. Technician A says if you supply full-fielded current to the alternator, and the charging voltage and current increases to normal levels, you usually have a bad regulator. This is only valid if you shut-off the engine after the finish line then tow the car back to the pits where you remove the plugs for reading !!. So, it is not just the pump that the constant movement is damaging, but also the engine and the entire vehicle. The ground strap eventually reaches the earth ground system, a ground rod, through a heavy gauge copper wire 11 feet in length. This is currently referred to as persistent post-concussive symptoms. Another member on another post mentioned that ground wires work on surface area. If your engine won't start, takes too much cranking to start or your engine stalls, you may have a bad fuel pump or you may have a fuel pump wiring issue caused by a corroded connection or ground or a bad fuel pump control module. However, apart from a loose earth connection, the fault may be caused by bad starter motor solenoid. Technician A says if you supply full-fielded current to the alternator, and the charging voltage and current increases to normal levels, you usually have a bad regulator. But, that's just. If someone removes this ground strap (or it goes bad) then you will end up with all kinds of bizarre electrical and engine issues!. So, it is in your best interest to recognise these symptoms quickly to get the problem repaired. In my experience, a bad engine ground usually results in flaky operation of the electrical system. The ignition coil receives a voltage of 12V from the car's battery and multiplies it to a higher voltage level. A bad mass air flow sensor will make very hard for the ECU incrementing the necessary amount of fuel during sudden acceleration. This does not need to be a very thick wire. Less than 50 miles later, same symptoms occur and I am returning to the dealer for repair. If you have a hot wire at the master switch, you can check the ground right from the master switch. So I started checking. That's all it was. My problem ended up being in the distributer. if it doesn't slip over the ends, cut the tubing now and slip two pieces per wire. If it sees it as a bad deal, there is a good chance of it shutting down on you. Heat is what kills. The ignition supplies power to the engine, the gauges and anthing else in that circuit. autozone codes were multiple cylinder missfires along with 3 tb codes. Some use the aircraft skin (on metal aircraft), some use a foil or aluminium sheet inside the aircraft, some use a coil of wire built into the base of the antenna and others use wires radiating from the base of the antenna. I noticed the ground wire broke off of the firewall from the hood, the wire is in bad shape from 10 winters or so. • Turn key switch to OFF position and let the engine cool down before making another attempt to start the engine. Tried to switch my house batteries over to start engine, no luck, not even a light on the dash. Signs of a bad Ground Strap. Fouled fuel found in a vehicle tank can usually be linked to a few suspects — it either came from the refinery, the distributor or the filling station down the street from your customer. 13-1A appropriate for the. Easy online ordering and next-day delivery available with 24/7 expert product support. i have heard from a few people that i should have 4 engine to body ground straps. Ford always used internal ground fields, GM was always external ground fields. If I'm not mistaken the strap is the only direct ground link from the engine to the frame, so corrosion at its contact points or loose bolts couldn't help. Flip open the lid on the smaller box. Engine hesitation during acceleration. Ground beef is a versatile ingredient that you can use to make burgers, taco meat, spaghetti sauce, and so much more. this is drivning me crazy. Ground Strap in Corvette Wiring Harnesses 1984-1987 Ground Strap, engine to frame. Bad Turbo Symptoms. Make sure all are connected. The jeep runs great, but the check engine light has been on for several years now. The battery itself is usually charging while the engine is running because the engine is turning the alternator and generating electricity, so it is unlikely to affect the running of the car unless is is shorting out or the is a bad connection to ground. But oh so true, about 90% of weird electrical probs are nothing more than a bad connection somewhere. What does the O2 sensor do? It is the primary measurement device for the fuel control computer in your car to know if the engine is too rich or too lean. From the engines powering rum runners of the 1930s to all those Jeeps in World War II, all of them had breaker point ignition systems. I just found a ground strap on the left (passenger side) of the engine bay. Poor ground connections are an often-overlooked cause of low charging output and alternator failure. This allows any device from your radio to lights or engine to complete the path back to the battery negative terminal simply by being mounted to the frame, using a ground strap from the device to the frame or body or getting its ground at the fuse box to the frame. Your BMW X3 engine is grounded via a main ground strap to the chassis. Customers may have a concern of lack of power and engine light on. Inspect and clean all engine and ignition ground connections. No cap and rotor on my engine. Another symptom of a faulty knock sensor is the misfiring of the engine on starting, accompanied by unusual vibrations throughout the vehicle. Check the negative side for the charging circuit the same as the positive with your meter's negative lead on the alternator case, or ground strap if equipped, and the positive lead on the batttery negative post. 3 liter engine will have several problems or symptoms that can cause driveability issues. I had the same symptoms. It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model. Each end terminates in a metal clip. on YourMechanic. It is also one of the possible causes of expensive oil leaks and sludge buildup inside the engine. One of the most common symptoms of a bad ASD relay is an engine that will start, but stall out almost immediately, or at random times. Raise the vehicle. During cranking, a lot of current flows through the ground strap between the engine and the battery, so there’s a voltage drop between the engine and the battery. Vehicles that are used to pull trailers (electrical brake equipped) may have similar symptoms. Connecting a mess of wires from the battery to the engine is not going to help if the connection between the ECU and engine is bad. 0L Jeep Cherokee engines. Here are a couple more symptoms of a bad MAP sensor: The check engine light (CEL) will be on with a MAP diagnostic trouble code (DTC) stored in the computer's memory. The large ground straps to the engine being bad would cause the engine to die when this happens. Going from the engine block to the battery is also a good idea. The bolt was rusted. Once it starts it sounds and runs fine, but it turns over very slowly until it starts. Coils can be tested by measuring their internal resistance with an ohm meter. You can also check the voltage meter on your car with the key on and the engine off. Remove the IDM(both ground strap bolts need to be removed) and shake it, listening for a sloshing sound. Grounding Wiper Motor Corrects Parking and Other Problems All vehicles with electric wiper motors Motor will not park, will not shut off, parks in middle of windshield, or motor will not run. If it sees it as a bad deal, there is a good chance of it shutting down on you. Re: 92 s10 Bad ECM? Dangerous to rely on wire colors since it is all too easy to splice in a wire of a different color, that is why i actually put in the pins on the plug. The module accepts information from various engine sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range. Top 5 Symptoms of a Bad Negative Battery Cable. Sometimes people look past these common blown head gasket symptoms because they do not want to know they may have a big problem on their hands. Eliminate vibration and energy loss, and improve the performance of electrical grounding and transmission systems using our flexible electrical braided copper shunts (flexbraid), flexible bus, ground straps and flex busbar. Step 1: Turn the dial of a digital multimeter to the DC voltage setting. NOTE: To correctly seat the converters, 10. but wasn't sure if he knew where to look for them all. Made a thread about DIYing the starter. It is attached to the engine side of the right engine mount and the other end is not connected to the car body. side firewall, to the rear of the pass. If the engine ground strap is missing or disconnected, you might have a whole bunch of problems, including electrical system malfunctions and difficultly turning over the starter. The engine will shut down and the PTO will be disabled. For this reason we have come up with a Troubleshooting Guide to help you out. i've gone thru 9 coils and now need a new computer as a result of this cable being too short and breaking from engine rocking. Does a Bad Alternator lead to power loss of the Engine Does a bad alternator lead to power drain from the engine. Plus, it can withstand extreme heat. But when oil is subjected to a high enough temperature, it can solidify and become baked onto the surface of whatever is close by, like for instance, a narrow engine oil passageway or critical engine parts themselves. Everything from radio to speedo cluster to brake lights. Engine Bay schematic showing major electrical ground points for 4. If your engine is having trouble starting or you see smoke coming from your exhaust, then one or. Page 1 of 4: How To Test: P0117 OBD II Trouble Code (Ford 4. 5v so I am having resistance on this circuit. Signs & Symptoms of Poor Ground Connection in an Auto Battery No-Start Condition. i got my meter out and read across the pickup coil, it tested good. if its cranking over ok, i doubt its an engine grounding issue. Over time, the vapor can begin to corrode the terminal and cause corrosion to build up. 2 volts when charged. 1984-1996 Ground Strap, antenna to frame. If you have less than 11. However with the weather been so ****ty, and i cannot find it in the HAYNES manual, could anyone tell me where it is,(a picture would be even better). fron of the engine block, and the braided ground strap, going from the pass. But the "major" ground cable from the engine block to the chassis is the one on the original posters' pic, at the back of the engine. [Tip from David Hungerford] What appeared as fuel supply symptoms were not relieved by replacing the filter, FPR, or both pumps (or by checking lines with vacuum pump/gauge). It is an on-vehicle multiplex communication line with high data. Also make absolutely sure the ground strap to the battery is tight and clean at both ends. OBS Ground Strap Locations I try to crank the engine and it gives me one click from under the hood. I connected the jumper wire like they show in the Haynes manual and turned the key on, but all I got was a steady check engine light on the instrument panel. The last ground is from the wiring harness to the engine. All of the following are correct about these symptoms EXCEPT: A. DO NOT RELY UPON THE MOTOR MOUNTS TO MAKE THIS CONNECTION. Sometimes, the bolt that holds the connector might have been disturbed and was not tighten properly. There are many causes of engine overheating and while we won't go over all of them, we will point out some of the main causes of engine overheating and point you in the right direction […]. Because fuel injection doesn't correspond to engine load, a broken MAP sensor can lead to an increase in harmful emissions. If the gap is too small, there isn't enough room for enough of the air/fuel mixture to get between the electrode and ground strap, so when the plug does fire there is a chance nothing will ignite. • Connect a ground strap from the engine to the body. The plug body, this is the part that screws into the head of the engine. In across-the-line driven motors, current-related bearing. Under high speeds or higher RPMs over 2500, a locked up fan can create a roaring noise. Not a bad DIY, just make sure you have flex sockets and the correct sizes. HELP- Symptoms of bad speed sensor? transmission problems- Ford Taurus Aside from a "jumpy" speedometer, does anyone else know the symptoms of a bad speed sensor on the FWD Fords? I know that on my old 91 Honda Accord- the speed sensor went bad and the speedometer would "jump" and the "S" light would illuminate and the transmission did wierd. There's another braided ground strap on the right side, in more-or-less the same location, but it's harder to see because there's more stuff above it. The ground underneath a home is now part of the electrical system and if anything goes wrong with the grounding system, it could deliver electrical shocks to the people in the area. Read the tech article on HEI Coils And Modules, brought to you by the experts at Chevy High Performance Magazine. Also, a ground might look good but need cleaning. My brother installed a radio in a Ferrari many years ago and was amazed to find it only worked when the parking brake was on. I had the same symptoms. Starting system troubles may be caused by poor maintenance, or just wear and tear. It is located in the section: Engine / Engine Electrical / Repair Instructions. Everything from radio to speedo cluster to brake lights. If you here a “police. I just added a ground cable from my battery to my alternator bracket, it really improved starting. i've gone thru 9 coils and now need a new computer as a result of this cable being too short and breaking from engine rocking. However, regardless of what you find during the inspection of the CV boots, if you still suspect you have a bad CV axle/joint, you will need to do a feel and drive test to confirm. The plug body, this is the part that screws into the head of the engine. After that, check output from the alternator. check for spark, and listen for the fuel pump when you first turn the key on. any truth to this? i just put the engine in the car and am ready to do some testing, but want to make sure i'm doing everything right. When the starter on your marine engine refuses to crank, the engine’s starter may have gone bad. Corrosion develops as a result of the acidic vapor produced by the battery when it becomes hot from exposure to the heat of engine operation. Remove the IDM(both ground strap bolts need to be removed) and shake it, listening for a sloshing sound. A bad throttle position sensor will not be able to give proper information to the on-board computer, due to which it will not detect the engine’s performance at the optimum level. Check the stator and timer base resistance and DVA output as given below: WIRE READ TO OEM RESISTANCE CDI RESISTANCE DVA (Connected) DVA (Disconnected). Symptoms of a clogged fuel injector: Engine runs very rough; One, multiple or all the cylinders are not firing. Therefore, none of them alone is cause enough to replace one. Lived with that for about 3 months. As the fuel pump has not been switched on, the engine cycle cannot be initiated because of absence of fuel. The next problem is caused by all the connections at the grounds. As I was bending over to install the knew belt my stomach was touching the "V 6" logo on the front of the car and I could feel voltage and it felt like a Lil but of a shock. Ground loops? You're basically creating a much more solid ground plane accross your engine bay. Be clear that this sensor affects the ignition timing of an engine. i personally replaced plugs, coil packs, fuel filter, 02 sensor and spent countless time going over grounds, engine wire harness and vacuum lines. Bad Fuel: Fact or Fiction? Bad gasoline is not a myth. Noise - If you hear excessive fan noise or a roar at all engine speeds. When i tap into that wire and ground to the body the CEL goes away but gives me a very odd hesitation that causes the car to die in lower RPMs. Just go from either your engines alternator ground point to the negative of your battery or take a grounding point from your engine to the negative of your battery. Top 5 Bad Symptoms. Proper grounding would dictate a ground strap from the engine directly to the wire harness. NOTE: Realize that the "absolute ground" of the electrical system is not the battery negative terminal or the vehicle chassis, but is the case of the alternator itself. The Powertrain Control Module (PCM) performs many functions on your car. When you have checked all the possible causes listed and you are still experiencing the problem, see your John Deere dealer. After changing the pump, nothing. Engine ground strap is disconnected or broken. I just touch one end of a wire to the maf pipe and the other to the mani at the same time and the car stumbles. This page will show some of the common ways to troubleshoot common faults. Symptoms of a bad engine ground.