fluctuating idle, already clean/ inspected everything

[nshihhsieh]

I recently got a '96 grand prix with a 3100 and 200K+. When idling revs go from 500-2000, up then down, almost dies, then it saves it self over and over. I cleaned the maf, cleaned the tb, new IAC, helped a tiny bit, but not too much. Then when i leave the in the morning, when i hit the accelerator, the car will die unless i keep my foot on the gas, but after a minute that goes away and the car drives normally. Could this be a Cam problem or a timing problem?

Thanks

 

[dpzelenak]

have you checked the ect sensor?
and have you tried pulling any codes form it?

 

[nshihhsieh]

i scanned my codes and it's just for my bad speed sensor, when inspecting the ect sensor, what should i look for, and can it be cleaned?

 

[NegativeOne13]

Sounds like a possible crank positioning sensor problem.

 

[dpzelenak]

^thats where i was going next, it could be anyone of like 10 senors, just start unpluging them one at a time and see what happens

 

[NegativeOne13]

Have you sprayed carb cleaner around engine while it's running? Possible vac leak as well.

 

[dpzelenak]

just thought about it,,,
does it run alright when you drive it and give it gas or does it do this all the time?

 

[slvr99]

I have a 99 GT and had the same idle problem. It was fuse #21 IGN1UH.
Repaced the fuse, cured the problem.

 

[nshihhsieh]

alright, i'll check it out next time i get a chance today, i'll let ya know what goes down