High idle 3.4

I just replaces IAC and cleaned the throttle body. Rpm in park 1200 and drive 950. Replaced some vacuum lines. I also unhooked battery for awhile.
Any suggestions would be appreciated and videos.
Thank you

 

What was it before the new IAC valve? Clean the MAF sensor?

 

It was running higher at 1500

 

I cleaned MAF as well

 

Is the IAC an OEM replacement?

 

No it was not an OEM.

 

Maybe you can pull a used OEM one off an engine at a PicknPull and see if it fixes the problem.

 

Something similar happened to me a few years ago after I cleaned my throttle body. I also cleaned my MAF in the same tinkering session. I observed high idle for about a day (same numbers as OP) and then it went back to normal. I assumed the ECU needed to relearn the A/F ratio after I removed the excess carbon from around the butterfly valve.

 

Normal for the idle to be a tad high after cleaning the MAF and/or throttle body. Mine idled around 1250 and slowly went back to normal over the course of a day.

If it idles really high or doesn't go back down then you might have issues with the throttle body needing to be re-bored. Sometimes when they get old the butterfly valve wears a small groove in the throttle body, when you clean it that groove now lets air past the valve at idle and messes with the idle speed.

Give it a couple days and see if it goes down on its own, usually does

 

Thank you guys, I will try this. I really appreciate the help