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Al 8/4/2010
1990 Buick Skylark Base 4 Cyl 2.5L - Engine
I have spark ony on 1 coil pack
The coil pack for cylinders one and four doesnt give a spark. The one for two and does. I jhave changed the coil pack and ignition moduel and still no change.
1 Answer
  • Bobby
    Bobby 8/4/2010
    the problem could be the crank sensor then. The crank sensor and cam sensors sends the signal to the computer for when to fire. You'll want to check for signal voltage coming from the crank sensor and see it is working properly or needs to be replaced.
    Bobby 8/4/2010
    could also be a bad ground in the ignition circuit. and worst case scenario the pcm is the problem.

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