mustangfan90

try your TP sensor. take a voltage meter and check the green and black wire you want it to read anywhere from .96-.99 volts or it could be your MAF sensor or your IAC (Idle Air Control)

Mustang50LX88

Hey Try this... If it hasn't been mentioned yet... I have tried this and it worked out for me just fine... it stopped the Idle surging and whatnot... Someone from the forums sent me the link to the website... I suggest if you have a printer, print out all the steps, that way it makes it easier for you to read it while working on the car at the same time, so with out further ado here is the link hope it helps... www.muscularmustangs.com/maintain.php Try it out it worked great for me.. Goodluck. :-)