Grand AM :: 2005 SE V6 Engine Turns Over But Does Not Always Fire
Sep 17, 2012
I have a 2005 Grand AM SE v6, 3.4 that I had purchased used in 2008 with less than 23,000 miles. It is now at 52,000 miles. My troubles started less than a year after I bought it. In the last 4 years I have viewed just about every forum on the issues I am having, but I have not come across any with the same issues, there is usually a slight difference. Here are the details.
Car has hard starting problems randomly. Engine always turns over but does not always fire. Sometimes it starts right up, other times it takes several attempts. Totally random.
Car randomly shuts off while driving. Just cuts power, no warning..no sounds. No specific speed, totally random.
When starting, with the key in the "on" position, if the "service engine" light DOES come on..the car will start 100 percent of the time. If the "service engine" light does NOT come on, the car WILL NOT start 100% of the time. This is totally random also, but the car will ALWAYS eventually start.
Once the car starts, it runs fine..sometimes it shuts off , sometimes it doesn't. I've had the fuel pump pressure checked ( right up to specs). Replaced the Ignition Module. Replaced the Fuel pump Relay.
No codes come up at all. Both my mechanic and a friend of mine ( and my own observations from reading forums) lead us to believe it is a PCM issue..but another thought I have is possibly the connections (fusible links?)
Is it possible for me to take the PCM to have it tested and would a local mechanic be able to so that or will I have to contact a GM guy?
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My 05 GP randomly decides not to start. it turns over well but no fire . Sometimes even when I just stop for gas when its already warm. if I leave it for a few minutes usually it will start, run a little rough for a minute then run fine till next episode. no faults show up. I was thinking maybe the fuel pump relay was acting up.
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If its 10 at night and I am at a game shooting THEN Im sure it wont start.
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