Rb20det silver Top running rich

[Lozer]

ALright guys i heave searched and checked almost every possible thing i can find on this problem.The engine runs great aside from the fact its running super rich it will occasionally start missing at high rpm's

Ive tested the MAF within spec (rB20DET STOCK MAF)The TPS within spec and slides up the voltage smoothlynew nismo AFPR set to 42psi with vacuum off 34 with it onthe coolant temp sensor resistance is a little out of spec cold but is perfect warm.

stock bov routed into intake.

FMIC with good clamps and good tubing.

Idle is perfect and i have no ecu codes that come up.

Im pushing 11 psi on stock turbo with no shaft play.

At this point im thinking about buying a FC to lean it out a bit.any further input would be great.

[Yellow4g63]

maybe that nismo fpr isn't working? I have seen them go bad before.

[WhatsADSM]

A boost leak would also cause it to run rich.

[Lozer]

well i went through all the hose clamps and made adjustments and tightend them down cold then drove it (still stinks under full boost) and tightend them down some more hot. seems slightly more peppy (probably in my head)

Ill find out tommorow if it's still silly rich when i throw it on the 4 gas.

Oh and what do you guys think of using the maf as a blow through as opposed to currently a suck through set up? (probably a silly q)

[WhatsADSM]

Did you use a boost leak checker to check for them. Here is a decent writeup on how to make a leak checker:

zerothread?id=113785

[Lozer]

yup found it and it turned out to be a boost leak past 11 psi turns out im running 12 psi. Causing some backfiring and rich running but shes all better now.