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R32 Gts-T Running Rich

Wastedyouth
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Wastedyouth Rookie

Wastedyouth

Posted
Posted

 HKS SSQV blow off valve. Hollowed out catalytic converter. 3'' JDM catback.

Compression is between 145-150 on all 6 cylinders. Metal headgasket. Nismo lightened flywheel. New intake plenum gasket. Timing belt/waterpump/idler and tension are all in great shape. Almost new ACT clutch(good for 400hp). Iridium spark plugs. New OEM thermostat. New air filter. HICAS lock bar. AC and HICAS were removed 

I just bought my car yesterday and realized some black soot and the smell of fuel while drivin I was told this mean my car is runnin rich.... How do I fix this help plz

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https://www.sau.com.au/forums/topic/403716-r32-gts-t-running-rich/
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Moodles2 Grand Master

Moodles2

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Atmo Blow off valve + stock ECU (without tune) is a recipe for disaster (running rich, stalling etc).

Without a functioning cat, you will find alot of black soot on your bumper, I hope you look forward to cleaning it regularly.

Truffles Community Regular

Truffles

Posted
Posted (edited)

Atmo Blow off valve + stock ECU (without tune) is a recipe for disaster (running rich, stalling etc).

Without a functioning cat, you will find alot of black soot on your bumper, I hope you look forward to cleaning it regularly.

I'll hazard a guess that this is your problem, too.

Essentially, the stock rb20 has a pipe that recirculates the released from the BOV back into the intake to be reused. When you remove the pipe or run an atmo BOV, your ecu still thinks the air being released back into your intake and adjusts the air/fuel ratio accordingly. Regardless if the air is there or not it will distribute the fuel, which is why it's running rich. Too much fuel for the amount of air going back in.

The remedies are either getting a stock bov and recirculating pipe or getting your car tuned for the new BOV, from which it will no longer make the assumption that the air released by the BOV is going back into the intake.

Edited by Truffles
  • 2 weeks later...
  • 2 weeks later...
THRLLR Community Regular

THRLLR

Posted
Posted

Sorry to hijack, but i have a 260rs (R33 GTR) stagea and it has twin atmo BOV, stock ECU, aftermarket boost controller, SAFC, turbo back exhaust system and everything else is stock.

The SAFC is set to default settings (no adjustments have been made, just in read mode). And i get heaps of soot on my tailgate, a bugger to clean.

Anyway i am wondering where the stock BOV is located, and also where the plumb back hoses/s are and go. I have an R33 GTS-T and that is very different in its setup.

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