Question about 1991 Buick LeSabre

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Have a 1991 buick lesabre 3800 v6, cant get to run, have had in a buick dealership replaced coil pack and icm, ran good for 2 then stopped, took back to dealership and the have been unable to find what is wrong with after a week of checking, they would only say that it was out of time, had taken home and replaced timing chain and sprockets still have the same problem, will turn over and try to start but backfires through throttle body,the parts i have replaced in the past 2 months are the ecm,crankshaft sensor,cam sensor, throttle position sensor,o2 sensor,fuel pump,fuel filter,icm, coil pack, injectors, timing set,serpentine belt,cam magnet,battery. all either different problems or just old, the car only has 52,000 miles on it, but unable to find why it wont run.

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  • khazl Apr 17, 2009

    found to be a bad icm again, dealer said wouldnt go out that fast, replaced with one from junkyard, car started up with out problems

  • khazl Apr 17, 2009

    found to be icm again, dealer says they dont go out that quick, went to junkyard and replaced icm with coil pack, car started like new

  • Nicolas Huet May 11, 2010

    Sounds like a fuel issue too me maby intake manifold leak theese are common "no start " problems try checking the fuel pressure regulator are you sure it is in time? one tooth off and this is what 3800's do



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Check the ECM if it has the number 1228253 on it, this is what is wrong with it. Gm trashed all of these bad ecms. Get a 16198264 as they do not cause a cutting off problem . Get a delco ecm , aftermarket units will give trouble and may be a rebuilt 1228253 which is junk.

Posted on Apr 17, 2009

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Changed fuel pump, ecm, coil, crank and cam sensors. will not start.

Posted on Aug 30, 2011


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