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Me too
I just got a check engine light and also showing a Pending Code P0299- Turbocharger underboost code.
The car is sluggish and smokes like a coal train on acceleration.
Also have codes
4865/not present-DDE: air to egr mass flow plausibility
3F25/not present-DDE: Charge-air tube monitoring
4530/not present-Charging press control, high-press stage, control deviation:
Charging pressure too low/positive control deviation.
Using Schwaben scanner.
Torque is giving just P2279- Intake air system leak.
I'm tuned with ATM intercooler, Airbox, ABC delete, cbu cleaned, and all the easy vacuum lines replaced.
I've done a visual and don't see anything obvious. I spiced into 1 of the 2 vacuum lines that go across the front of the motor, and I'm getting -22.5 inhg at idle and it goes to -25 at 2000 rpms. If I apply vacuum with the motor off and pump to -25, it bleeds off about .5inhg/minute.
(I wish I had done this earlier to have a reference)
I sprayed around with starter spray and didn't get any revs.
Just starting my trouble-shooting using this thread as a guide.
Thanks for posting Yozh.
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