Thread: High idle in every gear

Why do i keep having issues after i fix something?!?! OK... In the past couple days this problem has crept up.. The car is fine when i first turn it on.. The idle is right as it should be... but then as i start driving around and it warms up, the rpms are high in every single gear. When i come to a traffic light in drive, the rpms are at 1500 if i switch it into nuetral it goes up to 2000 - 3000, same if i put it in park. I have replaced the throttle position sensor and just replaced the idle air control valve with no change in behavior.. Any ideas where to start looking next? Possible vacuum leak?

How in the world could i mess up the IAC when replacing it? You take the part and it goes right in and then reattach the wire plug. I read that when you replace the TPS and IAC your supposed to disconnect the plugs for them and then remove the negative from the battery for 10 seconds to reset it... is this something to try?

TPS is fine. Any other ideas? Could the MAF be causing this?

Come on.... Anybody?

I reset the pcm tonight after cleaning the pcv to eliminate that as the cause and now the SES light is on. I'm relieved because now that might help figure out the issue.. going to find out what code is showing tomorrow.. will update.