Need help diagnosing problem.

[TheMule1]

what would cause the engine to have a hard time starting, have to press on gas to get it so start (even so still a hard time to start), revs on its own(new symptom), stalls when driving, turns off every once n a while on stops.
has a new csp sensor (5months). im thinking tps?? thanks for any help.

 

[FlexdXJ]

I agree on the tps, check the voltage on it. I'm not sure what its supposed to be but someone here can tell ya.

 

[redrider2911]

idle stepper motor sticky?

 

[TheMule1]

idle stepper motor sticky?

sorry for my ignorance but.. what is that?

 

[redrider2911]

bolts into the side of the throttle body. I think it has two screws that hold it on. Moves in and out to adjust a air flow bypass accordingly for certain conditions to adjust your idle.

 

[joe_peters]

Please post BASICS--year, engine, that kind of stuff.

 

[1990heepxj]

idle stepper motor is also known as the IAC or idle air controller

 

[birchlakeXJ]

Yup, need year engine for most accurate responses as there are significant differences in engines and management systems through the years (Renix vs HO, etc).