RPM breaking up when engine gets hot, need help

[07GtS197]

Do you have an aftermarket throttle body? If so, I’d do a base idle reset like others have said. In my experience, these cars have the idle set way too low making the iac do all the work creating idle issues. If the throttle blade is open slightly to allow the engine to idle around 500 rpm’s or so with the iac unplugged it’s always fixed my idle issues.

 

[clayton]

Do you have an aftermarket throttle body? If so, I’d do a base idle reset like others have said. In my experience, these cars have the idle set way too low making the iac do all the work creating idle issues. If the throttle blade is open slightly to allow the engine to idle around 500 rpm’s or so with the iac unplugged it’s always fixed my idle issues.

I recently just installed a brand new bbk TB along with new TPS, restrictor plate and IAC motor and set base idle and TPS voltage right before replacing the ICM.