Originally Posted by Ohdang1990
So im not new to the mustang world. In fact this is my second 88 gt. but i need some help. when i start the car it starts strong and the volts are right where they should be, but once it warms up it starts acting wierd. the volts will sometimes drop very low and even dangerously low when the lights are on. Ive never owned an automatic but it does it the worst when i put it in reverse. Ive changed the battery, alternator, and pigtail for the alternator. my guess is there is a short somewhere. Im just wondering if anybody else has ever had this problem and could maybe give me a few tips on where to look first. it idles fine but also bucks a little when at cruising speed but accelerates and slows down fine.
Do you have under drive pulleys?
Have you checked all of your ground connections?
Is the idle set to the correct specification?
Is your under wear too tight?
Have you checked and cleaned the IAC?
Have you checked and cleaned the MAF?
Have you checked the intake and vacuum connections for leaks?
Have you ever replaced the TPS?