Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I'm here to help get your problem solved.
Is the check engine light on? How long does it usually take before it starts again?
It sounds like the ignition switch may be failing, next time it doesn't restart right away check to see if pink wire going to ignition module has power with key in start position, if missing power then replace the ignition switch. If it does have power then check fuel pressure during problem, if fuel pressure is low replace fuel pump. If pressure is good and you have power going to ignition module check for spark, if missing spark replace the ignition module. Let me know how it goes or if you have more questions, thanks.
Everything is put under more stress at higher rpm "more throttle" so they would be more likely to act up under those conditions. Let me know if you have more questions, thanks.
No, that is also normal when things fail. They often work when cold then don't act up until warm but above tests will need to be done to know what part is failing, to me it sounds most like a ignition switch or ignition module.
Testing is going to be required no matter what, I wish I could give you a for sure answer based on symptoms but I can't and testing pretty much needs to be done always to make sure right parts are replaced. You should be able to test power at ignition module within 5 minutes and test fuel pressure within another 5 minutes. Let me know how it goes or if you have questions, you can reply to this answer at any time without additional fees. Thanks again and please do not forget to rate answer.
No problem, I'm happy to help. Let me know if you need anything, thanks.
You will want to check fuel pressure when vehicle will start and compare reading during no start condition. Pressure will probably be fine every time vehicle is starting so you need to check during problem, same with every other test such as as voltage to ignition module and spark test.
Let me know how it turns out or if you need anything in the process of testing, thanks.
Next thing i'd do is clean out the throttle body if that hasn't already been done.
No, if it restarts right away EVERY time I think your throttle body may just be dirty.
Sounds good, keep me updated. Thanks.
Good to hear, thanks for update.
It is possible and worth trying. Is it still restarting right away every time?
You are going to need to try and do some testing during the problem, I'd start with a fuel pressure test.
Thanks, ***** ***** updated.
That is odd, possibly fuel pressure or fuel pressure regulator. Pressure should go higher under full acceleration. Other thing is possible throttle position sensor or mass airflow sensor but those would usually turn on check engine light. Unplug the mass airflow sensor to see if it helps if so replace. If not then I'd still do the fuel pressure test. Let me know how it goes, thanks.