I recently Bought a 91 dodge stealth R/T NA, The guy who sold it to me told me i needed a new idle air servo. I replaced it, but the parts were not exactly the same, old one was tan colored with the number E9T15271A and the new one was all black plastic with the number E9T15271C. It fits right on and seems to work, But my question is when the bad Servo was in it wouldn't idle and would die, when it was unplugged it would idle rough when cold then it was fine when it warmed up. since replacing the servo the car runs fine cold but dies when its warm. If i give it gas or am driving it will run fine untill i shift into neutral and coast (The car is a Manual) then it dies. I adjusted the speed adjusting screw on the front of the throttle body and it idles fine warm and 1000 but when its cold it idles at 2000 2500 untill warm, then goes down again. I am thinking i need to adjust the screw back to normal but what else could be wrong making it idle funny and what else can i adjust.
thanks for any help!

The throttle position sensor could be going bad. The idle screw you adjusted supposedly comes preset from the factory and does not need adjusted. Usually, when you have to start adjusting it, their is another underlying problem.

Thanks, Is there any way to tell for sure if that sensor is the problem, the car runs fine when there is any load in the engine just idles rough, since asking my question it started fluctuating, down to about 700 rpm up to 800 or 900 when at idle. It also lookes like the throttle position sensor can be adjusted by the screw holes? or am I looking at it wrong?