If I build much over 10 psi and then push in the clutch my engine will pretty much instantly rev up well over 1k RPM over where it was. I'm not keeping my foot on the gas and causing this. It's not noticeable when doing pulls and shifting fast or driving all out but when driving hard in turns or driving somewhat hard it gets very noticeable. I can go into a turn building boost and let off the gas and go to clutch and brake and my RPMs shoot up and will be basically off the rev limiter when I go to downshift so I have to wait forever for them to fall.

I have S3 cams and the original spring in my Tial Q BOV from when I had S1 cams. Would this be the cause or is it something tune related that I need to post in the ECUFlash section?

 

Do you have NLTS enabled?

 

Yes. Think it's engaging and it's more RPM related than boost related? I'll turn it off and test. If that's what it is it works great when I'm driving all out and up shifting fast.

 

S3 and stock valve-springs make a bad combo.

 

As I'm aware... I have Kiggly valve springs.

 

It still does it with NLTS turned off. It isn't as often as I remembered though but I had it so it pretty bad a couple timea. I was just slow shifting at around 7k doing a pull and 1st to 2nd seemed fine but as soon as I pushed the clutch to shift into 3rd revs shot to 8k limiter. It's as if I'm still pushing the gas pedal but I'm not.

Throttle body sticking open for a short time?

 

Or maybe iacv going bad.

 

Or boost leak maybe. I had this issue when vacuum caps blew off my throttle body.

 

I just zeroed out ISCV RPM Adder tables after doing more research and will see if that helps. I'm not sure it's a mechanical problem or not so started researching it from the tuning side and came across others with a similar problem and changing these tables seems to be the solution for many people.