1990 5.0 Ho Fuel Regulator Vacuum

[Ian Ranchero]

My engine has a really bad idle and takes 10 tried to start in morning and even longer to stay running. I have replaced every sensor I can and even the 02s. I checked timing. Something strange is it idles so much better when I unplug the fuel regulator hose. Runs super rich too. Any ideas. I am looking online and some people are saying the vacuum connecting on the intake is for egr only? The hose from regulator was connected to the small drivers side plug on intake. I'll go take some pictures now and post. thanks guys

 

[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.