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car revs like crazy after I removed throttle body

S

splatter

New member
I just changed out the thermostat in a 03 Grand Prix 3100. When I put it back together it was chugging and dying. I took apart the intake and throttle body and cleaned the crap out of it. The car no longer dies but it revs randomly and the RPMs will stick at a certain point like 3k or 4k and jump around. The car does this when sensor number 4 from the picture is unplugged (i'm assuming its the throttle position sensor) and also when number 3 is unplugged (i'm assuming its the mass airflow sensor). Anyone know what the problem could be. Also if you could explain the numbered sensors in the picture it would help.
grandprixthrottlebody.jpg
 


1. Looks like the MAF
2. Looks like IAT

3 and 4 I need to see a closer pic.

One will be TPS and I believe the other is IAC

Hard to tell in the pics for sure, hopefully someone else can help identify.
 
Are you sure the intake manifold isn't leaking from not sealing right thus creating a decent size vac leak?
 
You probably didn't put that vacuum line back on the front of the TB, or it has a crack in the hose. I did that once after putting my tb back on and My car would Idle at like 2 grand.
 


Those gaskets aren't reusable if they are anything like any typical gasket.

A new one is a few bucks...go get it.
 
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