ei have a pontiac montana 2000 egine light is on and van is shaking did tune up and says one

  • Thread starter Thread starter Miss Cee'
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M

Miss Cee'

ei have a pontiac montana 2000 egine light is on and van is shaking did tune up and says one

spark plug is sti one spark plug is still misfiring, changed with another new plug still says the same thing and car is still shaking, may have a vacuum leak how can i find the leak and will it be hard to fix/
 
I agree with having the ignition coil tested. What error code is the computer transmitting?
 
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