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How do you change the plugs on a 2001 Pontiac Montana?

2001 pontiac grand am gt 3.4l random misfire .. i changed the spark plugs and wires , ignition module and cat?

  • i change the spark plugs an wires , ignition module and cat what could b the problem ? it shuts off at slow speed and full stops ...

  • Answer:

    Well you didnt mess with the fuel injector!!!!! I would like above mentioned, take it to a dealership & have them look at it. At least install the Tech 2 & see which cylinder is missing so your not messing with all 6. Need to find out which cylinder is missing so we know where to start. First thing I would do after that is found out is to remove the spark plug & make sure it isnt cracked. Sorry, but I do not trust back yard installers work. I have seen a lot of cracked spark plugs. Once that has been verified, next would be to install a fuel pressure guage & perform an injector pressure drop & see if the clinder missing is off from the others. If that checks out fine, inspect rocker arm & other internal engine issues

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The self repairs you made require your car to be hooked up to a diagnostic machine to reset or calibrate your engine management system. Contact a dealer service shop or call around.

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