Help Afte The Supercharger Install

Does the idle surge with the supercharger disconnected from the intake with only the MAF and the air filter in the inlet path to the throttle body like the stock configuration?

At1Maverick said:

I've been trying to upload a video of the problem, but yes, jrichker, even with the supercharger taken out of the loop, it still surges. Would it have anything to do with the blow off valve that's on the intake tube?

Click to expand...

Is it a blow off valve (vents to atmosphere) or a bypass valve (recirculates the air back into the system)? If it is a BOV and vents to atmosphere that could cause the issue if your car is mass air still and doesn't use a map system like megasquirt,holley efi, etc.

Have you tried pulling codes? Pics of set-up

Make sure that you have the stock air box, MAF and ducting in place, and no extra parts BEFORE trying to troubleshoot any idle problems. You need to separate the modifications from the stock configuration to make sure that the modifications did not make the problem happen.


Once the air intake system has been returned to stock configuration, then troubleshoot the idle problem.

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.