Boost creep? What does it feel like?

[VETTE_50_TH]

Alrighty. When i turn on my car, and let it warm up, it begins to do the idle knock from 1500- 2500- My idle adjustor on the intake manny was turn up pretty high. (i have now turned it down). Anyways, once getting on the road, my car boosts fine until around 3500 approx. then the car feels like it doesnt want to pull even though the stock boost gauge reads it is boosting. And i cant here the spool of the turbo, it quiets down a bit. But it does this only maybe once or twice in the span i drive it, and it only happens every 3 or 4 days. What is wrong? Is it a boost leak or boost creep? I have no idea.

 

[andymoraitis]

Boost creep is when boost hits a static point and keeps climbing even though the boost controller is set to a certain level. The first issue we have is that your stock gauge only estimates boost and isn't accurate. I would install an aftermarket gauge to get a better grip on what's happening.

That being said, your issue sounds more like a boost leak than anything else. While it could be fuel/spark related, I would start with a correct boost leak test to verify that the system can hold approximately 20psi for 60 seconds. A boost leak will cause lots of other performance related after effects such as hesitation and power drop-off so start there and let us know what you find.

Andy