[andramont726]

Hi folks,

I tracked my car last Friday on a road course but things went pretty bad. After the warmup lap, I pushed the car a bit and it went into limp mode with half-engine light. Power was cut away pretty harshly. Yay… Click here to enlarge

So I exited into the pitlane, and checked the codes. It showed a 30ff (underboost) code. Cleared the code and gave it another try. But the car would not build boost anymore, nothing, nada. It would go into limp mode again when WOT for too long. This happens on both maps 0 and 1 on the Procede.

So that was it for the track day. Drove the car home cautiously and checked for the usual suspects: boost leak at IC connections, charge pipe. Seems to be ok. Although it *looks* like the t-bolt clamp on the passenger side connection of the IC has moved a bit. Yet it seems to be connected. With the car not building boost at all, I suspect it has to be a major boost leak though? Click here to enlarge

I also moved the rear wastegate actuator by hand and it seems to move properly (sticky wastegates seem to occur occasionally on track cars). Haven’t checked the front turbo wastegate as it’s a PIA to reach that one from the top.

Next I checked the boost solenoid lines for leaks/cracks. Looks ok.
The boost gauge still shows proper vacuum values when cruising. Does this mean the problem is not a leak?

So that’s where I’m at now. What else can I look for?? This really sucks as it was the last trackday of the season and I wanted to get the car ready to install my RB turbos. Bloody hell.

[Omar Marji]

check your throttle body for any cracks or leaks. also check charge pipe by throttle body and turbo outlet

[Omar Marji]

also do a smoke test