Wont Stay Idling

[Reid Bergeron]

This may seem a little off to most of the guys and girls posting on this thread but I have a 94 F150 with a 94 5.0 roller block swapped into it. I am having idling issues. It will start up but it wont stay running unless your foot is on the pedal. I adjusted the idle adjustment screw on the throttle body ( which I know you are not supposed to do ) and unplugged the IAC sensor because I was trying to do a full system relearn. I just finished the install yesterday and still don't have a hood on it just to make more room to work and less head banging.

If the list of Mods doesn't show up in the signature line I'll post them

Thanks for the help

 

[SteveJessica]

Maybe your throttle position sensor

 

[mikestang63]

Have you run the codes

 

[stykthyn]

Are you using the truck ecu/wiring? Iirc the truck uses the non ho firing order correct?

 

[jrichker]

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.

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 159,000 hits, which indicates it does help fix idle problems quickly and inexpensively.