New problem

[Engin89]

Usually been able to solve most issues by searching on here thanks to you all.
This one has me stuck however. Started her up the other day and she coughed.
Now, cant get idle down. Changed out IAC and TPS, reset PCM, same exact thing. Starts fine, runs strong, no loud valve train noises, just not idling right and idle hangs driving around too. Any thoughts?
Here is a sound clip.......can a vacuum leak do this? and no, no supercharger!

IMG 0739 - YouTube

Any thoughts?

 

[VENOMOUS1 RACING]

Yup check your vacuum lines under intake.

 

[10-1=9]

I'd check them all

 

[Engin89]

If you listen to the end of the clip, it sounds like air leak...maybe at the brake booster.
Can I use my air compressor at low pressure and inject air in to find leak?
If so, where is the best place to tap? TB port? Has anyone tried this?
Thanks Again.

 

[ARRESTmeRed04]

Never tried it that way, just fire it up and spray brake cleaner or carb cleaner all around the intake and listen for a change. To test the brake booster just pull thr hose off and stick your thumb over the end to plug it up.