Idle Surge

@jrichker help the man out.

your on the right track it is most likely vacuum leak related.

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 200,000 hits, which indicates it does help fix idle problems quickly and inexpensively.

JKnight79 said:

So after replacing the parts that were throwing codes I still was no where. Replaced all the vacuum lines no go, by accident I left the vac line off my bbk adj fuel pressure regulator and started it up idled great but had fuel dumping out the vac line... So guess I found my issue geez

Click to expand...

See item #17 on the first page of the Surging Idle Checklist.
Use the checklist, do all of the steps and you can find and fix the problem simply and easily.