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Topic: idle problem? (Read 1021 times) previous topic - next topic

idle problem?

I have an 1988 t-bird, has a 302 EFI engine. I haven't started it for about 3 months. Well a couple days ago I thought I would start it up since it was a nice day. I started it up, and it was idling high, If i can remember correctly it was idling at around 1800-2000 RPM. It seemed like it was idling pretty high, and sounded like it too. I gave it gas for a sec and reved it to about 2,500 then it slowly went down to about 2000 RPMs again. Im not sure what the problem could be, but I would appreciate some help if anyone know what it could be.

Re: idle problem?

Reply #1 –
okay so i cleaned the IAC, and still the same problem is occurring? Does anyone have any other solutions on what it could be?

Re: idle problem?

Reply #2 –
Need to check the TPS voltage, should be approx ..75-.95v as measured from the black to the green wires. Also has it been scanned for error codes???

Re: idle problem?

Reply #3 –
How do I check the TPS voltage?
 

Re: idle problem?

Reply #4 –
Sounds like you have the same problem I had on my 87 Cougar when I got it....  I was told the IAc was toast...  WRONG!  I thought logically, then realized it was the TPS.  Went to the wrecking yard, grabbed on for $5, set it up, worked perfect!!! 
I followed advice from my brother in law who has worked as a mechanic for the state for about 15 years, and unplugged the IAC, the idle dropped to normal, and the car ran great, so I did what you did, cleaned it out, plugged it back in and the idle went way up.  The I got another from a wrecking yard, did the same, so I tried a third.  That's when I agve up his idea, and thought it out on my own.....