Rough idle when cold
 

Our stang runs really rough when it's cold. We took it out today and really ran bad - to the point where it wouldn't stay running.. It actually gives the indication that it's flooded. Let it sit for a while and was able to get it started and idling. Seems like when the engine got warmed up - it ran better. When we got the car it had about 1/2 tank of gas - not sure if there's any water in it or how long it's been sitting. Topped it off today with some high-test and put some fuel anti-freeze in the tank.

Does anyone have any ideas on what I can check to perform process of elimination? I'll be putting on a new fuel filter to see what that does. I've seen posts about the TPS voltage could that be something to check - if so where do I check - and what voltage should I be seeing?

Thanx for any help with this one!

Check the TPS. .91 at idle and 4.6 at Full throttle. Check between the green and black.

It sounds like you just got the car. I would give it a good tank of fuel or 2 first. Also give it a tune up. Change plugs, wires, PCV, fuel filter and check out the distributor cap.

You can check the TPS and IAT sensors too. But I'd do a tune up first.

We got the car in August and my son and I have been putting it back together - great project! We do have new plugs, plug wires, distributor cap, and rotor. Just got a fuel filter to put on trying to figure out best way to replace - without getting soaked with gas (another post). I'll do the PCV volve.

What are the IAT sensors you're talking about?

Man - I'm full of questions today, where is the PCV valve on an 88GT with EFI?