Random misfire

  • Thread starter Thread starter sduly79
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sduly79

I have a 99 Grand am SE 1 3.4 V6 My check engine light keeps coming on. I have taken it to the dealer and all they could tell me is that it is pulling a random misfire code. I have changed the following- plugs to ac Delco, wires, coil pack, module under the coil pack, main computer, injectors, mass airflow and mass airflow plug. AT low RPM I can feel the car misfire and high RPM or driveling there is no misfire and the check engine light only comes on when the car idles for a long period of time. Also when you take off from a stop the car hesitates slightly. I have had the car in the shop for about 3 weeks and they can not figure out what is going on with the car. I need help dose anyone have any ideas? IF you do please email me with any thoughts at sduly79@cox.net. Thanks
 
Hi we have exactly the same problem with our Sunfire like your Grand Am. I had my car checked today and the technicians told me that it has misfire code but there seemed to be no problem. So they reset the main computer (brain) of the car and check engine light turned off. But after a few hours it began lighting again. I either don't know what to do. I'll bring it to the service again. If I can learn how to fix it I'll give information to you ASAP.
By the way if you get any info please let me know.
See you..
 
random misfire

I have not learned anything new about my car I have found a vacum leak which they were convinced would fix it did not they also said a intake manifold gasket couse the car to misfire I have not tryed this yet becouse it will run me $560 and if it doe not work I just wasted the money think that it might be cheaper to get ride of it and get soemthing else help me please
 
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