TPS adjustment
Hope that helps
I've had to do it quite a few times Trending Topics
You can also use a scanner to look at the TPS voltage. Easier that way.
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I had a GREAT link on the topic but it went dead recently, probably doesn't matter anyway since most people like yourself couldn't care less about how to do something RIGHT.
Basically though The aftermarket TBs don't have an IAC bleed hole like the stock TB, you need to drill one and figure out how much larger than stock it needs to be. You also need to seal the IAC circuit on most aftermarket TBs because instead of channeling it into the little 1/2"ish hole between the main TB holes most let that air dump into the plenum which allows the front cylinders to steal all the air at idle. The small hole between the main TB holes on the front of the intake distributes idle air through the same circuit as the EGR and allows the cylinders to be fed more evenly.
I had a GREAT link on the topic but it went dead recently, probably doesn't matter anyway since most people like yourself couldn't care less about how to do something RIGHT.
Basically though The aftermarket TBs don't have an IAC bleed hole like the stock TB, you need to drill one and figure out how much larger than stock it needs to be. You also need to seal the IAC circuit on most aftermarket TBs because instead of channeling it into the little 1/2"ish hole between the main TB holes most let that air dump into the plenum which allows the front cylinders to steal all the air at idle. The small hole between the main TB holes on the front of the intake distributes idle air through the same circuit as the EGR and allows the cylinders to be fed more evenly.
I had a GREAT link on the topic but it went dead recently, probably doesn't matter anyway since most people like yourself couldn't care less about how to do something RIGHT.
Basically though The aftermarket TBs don't have an IAC bleed hole like the stock TB, you need to drill one and figure out how much larger than stock it needs to be. You also need to seal the IAC circuit on most aftermarket TBs because instead of channeling it into the little 1/2"ish hole between the main TB holes most let that air dump into the plenum which allows the front cylinders to steal all the air at idle. The small hole between the main TB holes on the front of the intake distributes idle air through the same circuit as the EGR and allows the cylinders to be fed more evenly.
I had a GREAT link on the topic but it went dead recently, probably doesn't matter anyway since most people like yourself couldn't care less about how to do something RIGHT.
Basically though The aftermarket TBs don't have an IAC bleed hole like the stock TB, you need to drill one and figure out how much larger than stock it needs to be. You also need to seal the IAC circuit on most aftermarket TBs because instead of channeling it into the little 1/2"ish hole between the main TB holes most let that air dump into the plenum which allows the front cylinders to steal all the air at idle. The small hole between the main TB holes on the front of the intake distributes idle air through the same circuit as the EGR and allows the cylinders to be fed more evenly.
I knew aftermarket tb's needed to be drilled, but what main tb holes are you talking about (the 54mm holes in the intake?) and what do you mean by the IAC circuit? Are you saying you need to seal off the IAC from incoming air completely?
See how on the back between the two passages, they are opened up in the middle. You need to drill a hole right through the throtttle body in the middle hole, roughly same size as the stock throttle body. Also you need to make a piece to fit in there that will more or less keep the two passages seperate from each other. Still needs to have a hole right through tho for the iac air.
Its hard to picture. If my car wasnt under a tarp right now id go rip mine off and take a picture for you. I had to modifiy mine to get the car to idle properly.








