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I just finished putting my car back together with 2.5" intercooler piping, dual mafs (no translator or S-AFC so only one is metering), and Nismo 555cc injectors. I'm trying to get a base tune sorted out and keep having problems with it running super rich. I started with a K value of 420 and have been slowly bumping it down to try and lean it out. It's getting better but I'm down to 390 and it is still running rich. Fuel pressure is set at 39psi. It's consistently rich even at warmup, the coolant temp sensor tests within the specs in the FSM. ECU is not throwing any codes. Should I keep bumping down the K value?
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