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Im having damn near the same problem from 2k rpm to 3k rpm it sounds like the car has a boost leak and builds Mabe 1-3 psi then as soon as Im past 3k rpm the car absolutely rips like there’s nothing wrong it seems like the first turbo isn’t working at all and I’ve done everything possible to fix this that I can think of you can physically hear it sounds like a bad leak WHOP- WHOP-WHOP from 2k to 3k then it’s fine.. I’ve replaced now 2 new oem boost solenoids, brand new burger charge pipe and tial BOV, smoke test passed with flying colors Multiple physical inspections of fmic, all hard piping, vacuume lines etc.
It’s not a tune issue everything there functions as it should. I’m JB4 with MHD back end flash with catless downpipes FBO and oem turbos. Had 30ff code and have been chasing it down for about 2 weeks now. I’ll post a log I did today any help would be really appreciated. Thanks.
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