Question about 1991 Buick LeSabre

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Looking for the ecm i have changed the coil pack the plugs and wires and the car still will not idle or even pull itself

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Under the dash, passenger side, in back of glove box.

Posted on Aug 24, 2010

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2 Answers

Missing no power


Having the Yr make and model and engine size will really help out on the car that you have. but you could have a bad ECM and bad Coil packs or you might have just 1 bad coil pack on the vehicle. the coil packs and the ECM get looked over by a lot of people.

Apr 26, 2016 | Cars & Trucks

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I have a 97 dodge caravan 2.4L dohc. I started with an engine code of p0303 and p0304. The vehicle has a rough idle and has difficulty accelerating from idle to 35mph. I've run several tests; 1, pulled all...


DTC P0303: Cylinder 3 Misfire Detected
Probable cause:
  1. Control unit software needs updating
  2. PCM or ECM faulty
  3. Fuel injector(s) faulty
  4. Ignition system - Ignition module, coil, spark plugs and wires
  5. Fuel system

Mar 13, 2017 | 1997 Dodge Caravan

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Car is idling rough all coil packs have been changed along with spark plugs


Dont get another harness. If you are using Autozone supplied coil packs, the problem is most likely the coils from Autozone. I have went through this exact same thing before. I changed the coild because one had a burn mark on the boot between the plug and the coil pack. I noticed it when changing spark plugs. The new coil from Autozone made the vehicle struggle on take offs and idle rough and the vehicle had no power. I installed another coil from Autozone again which was supposedly a better model and costed more. The vehicle ran a little smoother but the rough idle and small misfire was still there. I installed another coil from the dealership and the problem was fixed immediately.
I also replaced one of the coil connectors for a different cylinder but only because i broke it when disconnecting the coil packs to remove the spark plugs.
And when I installed all my coils and the new one from Autozone, I used dielectric grease on all the connectors. But the rough idle and power loss was immediate following installing the new coil from Autozone.
Beware if you are using coils from another part store because many part stores get their parts from the same source.

Jul 18, 2012 | 1996 Volvo 960

1 Answer

Where is the ECM located on a 1993 Isuzu Trooper?


If you don't have a coil pack working, unplugging the ECM will do nothing to reset the coil pack. If you have power present at the plug, you need a new coil pack.

Jul 28, 2009 | 1993 Isuzu Trooper

2 Answers

2000 Jeep Wrangler 4.0L ECM replacement


well you wont need to change the ecm if its not burt yet.
try correcting the short first before you do burn out the comp.
if this is the model with the in line coil pack you will need to make sure the heater hoses are not drooping down on the pack.use wire straps to raise the heater hoses just off the pack.you may want to remove the pack and put some dielectric lube on the spark plug boots so it goes down all the way on the spark plug.when the plug miss fires and causes the engine to stumble the comp raises the idle to compesate.then the plug fires again and the idle surges.
hope this helps
jm

Jun 22, 2009 | 2000 Jeep Wrangler

1 Answer

When idling my 2003 Acura TL the engine seems to want to almost die, also when i got on the freeway it seem to pull hard and **** like it was having trouble shifting into 5th gear. It also seems to run...


You may need to change the coil pack(s) or modular. The modular is what the coil pack(s) mount to. I'm not familiar with that engine so you may have a 3 piece coil pack, or a 1 piece. (If it doesn't have a distributor). You may first try replacing the coil wire. There is a good chance that is loose, or bad. It could also be the coil itself. Try the coil wire and if it still acts up, then try the others. Also, when you changed the plugs, did you put new plug wires? When I do a tune up on my vehicles, I change the plugs, wires, distributor cap and rotor, (coil pack,modular), whichever is equipped, oil, oil filter, tranny fluid and filter with gasket, valve cover gaskets, oil pan gasket oil filter, and fuel filter. Try changing the fuel filter as well, as plugged or dirty fuel filters can cause stall outs. I hope this information helps. Thank you for choosing fixya.com for answers.

Apr 01, 2009 | 2000 Acura TL

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