Question about Buick Cars & Trucks
I have a 2005 LeSabre. in the last 2 yrs I have had the Ignition Control Module go bad now for the 3rd time. the first time I just replaced it. the 2nd time I replaced it I also replace the coil packs and spark plug wires. The ICM is a Delphi and the coils and wires were AC Delco. this time I took to the local shop and they did have a reason for this to continue to happen.
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Posted on Jan 02, 2017
A misfire doesn't always have to be ignition... it's just the most common cause. Faulty or plugged injector, low compression. You need to check fuel pressure and test the fuel injector flow. Then check compression. If you don't have tools for these tests, take it to someone who does. Testing is much cheaper than throwing parts at the problem.
Posted on Feb 25, 2010
This is an all too common problem with the Cavalier and other GM J-body cars. Usually it is because of the crankshaft position sensor or the harness going between it and the DIS (aka ignition module). Without the DIS seeing a signal from the crank sensor, it doesn't know when to trigger fuel and spark.
Sometimes this can also be caused by a faulty ignition switch. The switch will allow you to "crank" the car, but it doesn't make the proper connections for the ignition system, so the car never actually runs.
The previously indicated oil pressure switch could also be causing the problem, but if you hear your fuel pump run then it's OK.
Hopefully this helps. If not, your Cavalier is as messed up as mine and probably not worth fixing.
Posted on Feb 14, 2011
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