Car Running Strange. Anyone Have This Happen

[LatinR33]

Hey how you all doin. What I have noticed is that my idle is goin alittle wacky. If i drive on the freeway at high speeds then begin to drive around the suburban streets my cars idle is fine. But if i dont do this and just drive around at normal speeds and not do the highway thing then my idle starts to rise to 1,000-1,200 rpm. TPS is fine, so is AAC valve,last time i checked the o2 sensor is working fine. I did a ecu reset this didnt fix it. With the ecu reset are you meant to give it a good thrash afterwards cause i didnt. Should I try this again?? Just strange idle has a mind of its own. yesterday it was even idle hunting for like 5 seconds then just stopped on 1,000rpm. Car drives fine otherwise just annoying and strange about the driving at high speed and then drives fine. any clue whats happening.

[Mulkers]

Check all of the vacuum lines for splits/ large cracks etc.

AFM may be another think to check

Edited March 12, 2006 by Mulkers

[LatinR33]

Yeh leaks ay?? So putting soapy water would be fine??? How do you check AFM?? Do I need to take the whole thing out. Is there a test to check is its gone or is the probem?? The car is doing it even if i drive it on the freeway. Very annoying.