High idle after throttle body cleaning
 

Got the po506 cel. i have an idle that would dip past 0mph and come back up after being put in neutral when i pull to a spot, so i decided to clean my throttle body and MAF, checked for air leaks and since i always clean the MAF so that was good, however it was my first time cleaning the TB so it was really dirty, when searching for diy videos i managed to skip the part where there was still coolant in the lines connected to the TB. so i removed one of the lines only to have coolant go all over the place. Anyway after putting everything back together and refilling coolant the idle is kinda high in neutral, drives great though. i ran across a thread similar to this one same symptoms after cleaning and resetting, the guy said he was gonna repost to state whether the car just needed to relearn everything or not. he never did so does anyone have any idea what it could be. i guess id rather have really high idle opposed to no idle haha. :wallbash:

So did you reset the fuel trims? (20 brake pedal stomp) ? I see you mention you read a thread about it but didn't mention if you did actually do it.

If you did that and the idle is still high i would hunt for a vacuum leak somewhere (one of the intake tubes that you may have forgot to connect)

Disconnect battery and reconnect . See if it's still high after that .

I reset it three times I haven't disconnected the battery though but what's the difference between that and 20 foot PCM Reset?

I'm not sure if the stomp resets the throttle or not ...try the battery disconnect and see .

I always hate removing the battery terminals! it sucks because I need new ones but I guess it won't hurt to try it. If anyone has any other suggestions please... Enlighten me. And if coolant got to the coils I would have a bad idle right? I was concerned about that as well i dried everything to the best I could even used a blow dryer for a bit..

Yes I have another suggestion ...spend $10 and replace your freakin' battery terminals !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Might be the best $10 you ever spent on the car!

Lol its not that they are old or bad or corroded I just don't like how they fit. But your right.

spray brake cleaner and see if you have a leak near the throttle body.

I will try this when I replug the battery in half an hour if the problem still persists. Thanks

They streatch over time and cause all sorts of problems because you can't tighten them up enough to get a deccent connetion.

Well gents just re-plugged the battery and idle seems to be perfect resting a little bit before 1000 when fully warmed up so thanks for the advice on unplugging the battery that seem to have fixed it and also took my check engine light awaybut let me drive it for a couple of drive cycles and we'll see if the check engine light comes back i'm currently letting the car idle for a little bit to see if my coils were affected in the coolant mishap.

Yeah, both the 20 stomp and the battery disconnect/test mode procedure have to be done to reset fuel trims and sensor profiles (the trims were probably fine, but the TB sensor was likely reading differently once you cleaned it).

I know I was scared for a little...I was like, what have I done?" Im still feeling stupid about the coolant going all over my engine bay though, still wondering if it affected my coils but one things for sure....it now it smells like coolant when I pop the hood. :tear:

Your coils are almost definitely fine, just wipe them off and don't worry about it!

I believe you. :cool: