Boost Issue

[Pu Manchu]

prolly a boost leak somewhere between your turbo outlet and throttle body.

[Sensei]

It was hot as hell out today so I only messed with the car a bit this evening. I confirmed the hose from the TIP to the BCS is not clogged so that easy fix is not the issue. All the other hoses are in place and look okay but it's impossible to tell for sure without really getting in there.

Originally Posted by 180mph Ill let someone more educated chime in here but to me it seems something mechanical is going on. Considering that your LTFTs were at -5 in log 93 before and in log 94 your LTFTs are at -15 I would start by checking all of vac hoses for tight connection. I am somewhat of a novice compared to the great people on these forums so take my .02 with a big grain of salt. Thanks

I'm not too worried about the LTFT. They're showing that I could use a MAF cal but not much I can do without paying for a retune and I don't think the LTFT are related to the low boost I'm seeing. If the BCS is the issue and I replace it I'll be getting retuned and the LTFT will get sorted out at that point. The plan for now will be to take the intake off and replace all the 4 mm and 6 mm vacuum lines with thick walled silicone ones. I'll also check that the BCS opens when it gets 12 volts.

Originally Posted by Pu Manchu prolly a boost leak somewhere between your turbo outlet and throttle body.

I'd think a boost leak causing the loss of 7 psi would throw the AFR way out of wack and the car would have drivability issues. The car feels fine other than the missing power. I'll still give all the FMIC piping couplers and the BPV a look while I'm at it.