Im in the middle of a cam swap, and my buddy who flashed my ECM, told me i would need to crack the blades on the TB so that it would have enough air at idle.

I figured i could just use the idle screw and move it in a little, but i since read that doing so would set a SES light.

So

A). Will adjusting the screw set a SES code?

B.) How else can i adjust the blade position? I know he told me i can do "xxxx", but i was set on doing the screw so i really didnt listen too well. Now that i read about the SES ight, and im having second thoughts.

 

that is not a idle screw, it's preset at a specific opening from the factory. the idle air cntrol is your idle adjustment.
keep him away from your car if possible..jmho!
you compensate for the cam with pcm programming..

 

You want to control idle through programming if at all possible. The screw is a throttle stop and it's purpose is not really for idle adjustments. If the cam is so wild that the IAC counts cannot be gotten into a favorable range, then I would consider adjusting the stop screw.

 

Yeah.. the IAC will probably take care of how much air the engine needs for idle. If it needs to idle higher the programming needs to be changed to tell the computer what to idle at. The IAC will regulate the air needed to idle at that programmed idle speed. It is a delicate balance between idle stop and IAC counts. Basically if the computer can't control the idle with the IAC is goes a little crazy.

 

First off, let me say im the idiot who called it an idle screw, didnt really know what to call it.

The cam is a 234/242, .598/.575 on a 112. So its a fairly good size cam.

The guy i mentioned in the orginal post is pretty much an f-body guru, and i trust his advice. He has installed this cam in a few other cars so i guess he knows if the IAC can control it at idle or not. We pulled the program off another car pretty similiar to mine which has been flashed a few times. Hopefully it will be fairly close.

Guess I'll bolt the TB on and see what the IAC does at idle and WOT. Only 4 bolts to take back off, no biggie.