Real Fiero Tech

I have a 2.5L 1984 4 speed Fiero. When you start the car cold it high idles at about 2500 rpm until it warms up and when it does warm up it idle wanders between 700 - 1200 it will sit on 1000 but then will drop and recover. My question is if somebody has a suggestion on what might cause this and if that high idle is a little too high (it seems like it to me).

Thanks

\/\/olken

My 4cyl ALWAYS idled high... But mine did at 2500 too until I found the problem.



It's that STUPID hot air intake valve.

When cold, the valve is open, which makes it into a nice big vacuum leak.

which promptly disappears when the thing gets up to temp.

But in any case, the 2.5L ALWAYS idles high when cold... 1500rpm is pretty normal, IMHO.

Look for that fucking stupid flapper valve on the side of the air intake with the vacuum line running to it. Take off the line and plug the vacuum port at the TBI.

I will check that out, now to figure out the stumbling idle.