zootzee

Hi all,
I have a 97 Trans Am
In August I replaced the fuel pump and ICM. I started the car Saturday for it's weekly start and fired right up. Then stalled now won't start again, just turns over. I hear the fuel pump kick on when I turn the key. The original Opti is in the car, but I only have 37,000 miles on it.

Could the Opti be gone?
Is there an easy way to tell?

Thanks for reading or any input.

BALLSS

It could be many things. First rule out fuel "pressure" as a cause. Hearing the pump or just pushing the Schrader valve and seeing gas come out is NO way to check FP. Use a gauge

If FP checks good move on to ignition

ICM/Coil/Opti are then likely candidates. If the ICM you replaced was not a AC Delco....might want to test that. Some auto part stores have a tester for it....but it can test good cold but fail when hot. The later not something that occurs during bench testing...unless you use a heat gun on it

SS RRR

iTrader: (2)

If an opti acts up it usually presents with sputtering/missing/backfire/etc. The "starts fine one minute/quits the next" is usually coil/ICM related. As stated, check your fuel pressure. If you want to do a shade tree thing, get some starter fluid, have someone crank over the engine while you spray it in the throttle body and see if it'll fire up.

zootzee

OK thank you for the replies.

So I can't get a fuel pressure gauge until the weekend now. I had replaced the ICM and fuel relay in August when I replaced the fuel pump. So I replaced those with the old ones that I had (because it wasn't them in August it was the fuel pump).
My buddy just came over with a spark plug tester and we put that on, I am not getting any spark.
Like I said the car was running fine, started no problem, just died at idle and now just turns over.
So now I am thinking coil????

SS RRR

iTrader: (2)

http://shbox.com/1/4th_gen_tech2.html#opti_test

zootzee

So I am not very knowledgeable with checking omhs. But I put the positive on where the coil wire connects and checked the other 3 connectors I get the same reading (the dial on the omhs reader at 20k) which is 5.61
I also checked that all 3 connectors have continuity between them.
Does any of this makes sense?

seawolf18

iTrader: (18)

Thats 5610 ohms. If its a stock coil it may be bad, since its supposed to be 8500 ohms. Swap out the coil, and see if that does it.

zootzee

OK thanks, I appreciate the reply

zootzee

seawolf18

iTrader: (18)

It could be. Hook the new one up and see if you get spark.

zootzee