Quote:
Originally posted by FlexinTwinZ
The car takes off fine up to 5000 RPM, then starts to stutter through the redline . . .
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It sounds like the turbocharger wastgate is seizing, or not opening freely. Have you checked the wastegate valve and actuator operation?
There could be a number of possible problems, including lack of oil supply to turbocharger; damaged turbocharger bearings; dirt/oil deposits caked on compressor wheel and/or diffuser vanes; fuel system defective or not properly adjusted; dirty air filter; and restricted exhaust or block cat.
Have you scanned the ECU? If so, what was the readout?