RPMs hanging high

Yesterday my car did something funny, the rpms would not go below 2K unless I had the air on then it would run 1700 rpm, it would go lower if I I shifted to a higher gear, but it would actually accelerate my car by just a little, almost like my pedal was stuck in 5%. I stopped and restarted the car a couple times, and it did the same thing, then it creeped up to 3k and wouldn't go lower. It finally went away after I pulled the battery cable off and reset the computer.

Anyone had this happen before? I'm running a stage 2 open ecu map and have been running it for atleast a month, with no problems.

 

motor mount problem maybe? could be a few things but thats all that comes to mind now

 

i was experiencing this problem about a month ago and at the same time i wasnt hitting max boost. turned out to be a pin sized hole in the hose that goes to the wastegate actuator

 

Maybe your IAC valve is stuck open/closed from dirt and needs to be taken out to be cleaned or maybe it needs a replacement.

When my Idle Air Control valve died on my old WRX, my engine's RPMs hovered around 2000 RPM as well. Only in my case, I had a bad, fluctuating idle that would make the car drive like crap until it went into open loop (3rd-5th gear 2200+ RPMs). I found out it died when the dealership replaced that old IAC valve with a working one. I had to pay for a new one.

 

I would agree with the IAC, could also be a TPS or just a loose vacuum hose/vacuum leak

 

Thanks for the suggestions, I'll keep an eye on it, after teh reset it's been fine, so I'll have to see if or when it does it again, meawhile I'll look some things over.

 

Weird. My car will do the exact same when it's hot out and I'm in stop and go traffic. Either getting up to highway speeds or a quick ecu reset (via the AP) will fix the problem.

I had it happen once while the laptop was connected to it and noticed that the TPS was still at 0% when off the gas but rpms were at ~1700ish.

It probably won't help, but I'm going to try and loosen up the cruise control cable just a bit. The problem is definitely underhood heat related -- maybe I should just drive around with no hood ever.

 

Ok, it's been over a week now since I loosened the cruise control cable on the throttle body. I've been in a few prolonged stop and go situations and haven't been able to reproduce the high rpm problem.

 

I haven't seen it come back either, I do use cruise control probably 80% of my driving, especially since I'm stage 2 :evil: