ForYourOwnGood
Well-Known Member
- Joined
- Jun 28, 2016
- Threads
- 41
- Messages
- 1,397
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- Location
- Central MA
- Vehicle(s)
- 2017 Grabber Blue 5.0
- Thread starter
- #16
No I was careful not to move it at all. I know better than to damage those diaphragms.Actually, I’d maybe shoot @EBtech a message and ask if it could possibly be the bypass valve. The revs increase because the load to push the car is gone (clutch in) but the throttle body is still open or the bypass valve is stuck and allowing boost still. I’d look at those 2 things mechanically.
Did you move or play with the bypass valve during install? Warning sticker on it not to move it...
OEM throttle body, yes catch can and no long tubes. I have a tune revision that disables the rev hang I just haven't had a chance to get it flashed yet. This effect only happens some of the time so its really hard to pin down. I have checked for vacuum leaks and had it smoked, my buddy has one of the smoke generators and plug kits. I'm also not getting any symptoms of unmetered air in the system at all.Three questions, is this an OE throttle body, do you have a catch can setup of some sort, and do you have long tube headers?
Something isn't playing nice with the OE rev hang programming which of course is an emissions strategy. It might be reliant on the MAP sensor seeing manifold vacuum before closing the throttle, which it won't see under boost until the throttle is actually closed or some other parameters are met.
I'd start by smoke testing for a vacuum or intake leak and go from there.
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