Idle Problem

87stang92sho

Active User
May 7, 2017
52
2
8
i have an 87 mustang gt with an AOD transmission, I recently took the transmission out to have it rebuilt and then went to start it and the car will surge and idle up and down then eventually die. I have tried checking plug wires and lines, I found one line that was unplugged but nothing else now it seems to want to idle at 600 rpm which is far from normal. Im not sure if the car will die at that rpm i ran it for a minute at it stayed there I haven't done anything to the engine just took the transmission out and put it back no clue why its doing this please help!
 
You guys with idle/stall problems could save a lot of time chasing your tails if you would go through the Surging Idle Checklist. Over 50 different people contributed information to it. The first two posts have all the fixes, and steps through the how to find and fix your idle problems without spending a lot of time and money. It includes how to dump the computer codes quickly and simply as one of the first steps. I continue to update it as more people post fixes or ask questions. You can post questions to that sticky and have your name and idle problem recognized. The guys with original problems and fixes get their posts added to the main fix. :D

It's free, I don't get anything for the use of it except knowing I helped a fellow Mustang enthusiast with his car. At last check, it had more than 250,000 hits, which indicates it does help fix idle problems quickly and inexpensively.