[JMonaco7]

Hey folks, I genuinely need some help here. I drive a e90 N55 FBO with a piggyback JB4. The gas gauge is high jacked to show boost and for a long while it would spike to around 16 psi and stay around the 10-12 mark during wot.
Without anything changing except replacing a front bumper, the car will spike to around the same 15 psi mark, then drop back to zero. There is a significant drop in performance and torque. The JB4 stops the car from throwing codes as nothing shows up on the dash or through the OBD2.
Any ideas would be greatly appreciated! Thank you all in advance.

[weehe126]

First, turn auto clear off so you can see codes. Second, post up a log. You either have a massive boost leak or a bad boost solenoid.

[JMonaco7]

Originally Posted by weehe126

First, turn auto clear off so you can see codes. Second, post up a log. You either have a massive boost leak or a bad boost solenoid.

May be a dumb question, but how would you go about turning that off?

[weehe126]

Are you in the US? If yes, just update to the latest firmware. Otherwise you will need to look up the steering wheel controls over on N54 tech.

[Mike@N54Tuning.com]

Originally Posted by weehe126

First, turn auto clear off so you can see codes. Second, post up a log. You either have a massive boost leak or a bad boost solenoid.

+1

When you were doing the front bumper any chance you bumped into the cold size FMIC hose? That could cause a large boost leak if it popped off or came loose.

Mike