1995 grand prix gt descides when to start

sometimes it will start and other times it wont, it will turn over fine... but what could cause a car to stop starting.... i can drive it for an hr and then park it and it wont start again, just turn over...

I had a 92 with the same problem. I replaced the ignition module and it fixed the problem.

how much do those run, and is that something i can get from a junk yard? would you have a pic of one?

They are like 90 bucks for a Grand Prix at autozone. Be sure that's what it is before you replace it. You can always take it to a garage to find out, some places will check a car for free, just have to call around.

oh, ok thanks!!! but is there anything else, like i said it will drive around and then park and not start... u know?

I would check the crank sensor first. Much cheaper and easier to replace. It's a common problem on 3.1's When the car doesn't start, are you getting spark? If not, try a crank sensor first.

it will crank and i get spark, but its a 3.4

I would agree with tazz on this one I would check you CPS first it is alot cheaper and I had very similiar problems and if it is the CPS it will soon decide to not start at all. That is were I am sitting with mine (3.8L)

how woudl you get it tested? what do you need to take off it?

Most of the guys at the GM service center,forget about the CPS failing and there is really no way THAT I KNOW to test it and 99% of the time it wount set an SES.Here is a pic of what it looks like and its behind the harmonic balancer.

http://www.rockauto.com/ref/ACDelco/213-234.jpg

Pic of Ignition control module and they arent cheap,$117.35 from GMPartsdirect.com and list price from dealer is $234.70.Your coil packs sit on top of it.

http://www.rockauto.com/ref/ACDelco/D1998A.jpg

ouch... how bout a junk yard?

I would check the crank sensor first. Much cheaper and easier to replace. It's a common problem on 3.1's When the car doesn't start, are you getting spark? If not, try a crank sensor first.

I agree with rich.Id try the CPS first since it is the cheaper of the 2 and for your car they cost 23.47 = shipping thru www.gmpartsdirect and dealer cost is $46.94 or call around at some of your local auto parts stores and ask for a Crankshaft Position Sensor and see what they cost.Then if that dosent do it you may try some salvage yards for the other part.

~Larry~