Nissan 370Z Forum - View Single Post - Running lean after CAI and muffler delete

KeithF · 10-24-2019, 09:18 PM

Hello all,

I recently installed stillen CAI on my z, it ran beautifully! but after 50 miles I get a CEL. I decided to buy some MAF cleaner and do my diligence, I reset the ECU again. It ran beautifully again! another 50 or so miles the CEL pops up again and idles at 1k and runs like a limp donkey half the time. This time I run a scan and I get P0174 for bank 2. I clean the MAFs again, reset the ecu, and spray some maf cleaner to see if I can detect any vacuum leaks. I couldn't find any leaks, and after the reset it runs beautifully again. Here we are another 50 miles later and the CEL is on, idling at 1k, and wondering if I made a mistake by putting the CAI on after the muffler delete and wondering if I absolutely need a tune. Any ideas?

thanks,
Keith

10-24-2019, 09:18 PM	#1 (permalink)
KeithF Base Member Join Date: Apr 2018 Location: California (CA) Posts: 15 Drives: 11 Nissan 370z SP M6 Rep Power: 7	Running lean after CAI and muffler delete Hello all, I recently installed stillen CAI on my z, it ran beautifully! but after 50 miles I get a CEL. I decided to buy some MAF cleaner and do my diligence, I reset the ECU again. It ran beautifully again! another 50 or so miles the CEL pops up again and idles at 1k and runs like a limp donkey half the time. This time I run a scan and I get P0174 for bank 2. I clean the MAFs again, reset the ecu, and spray some maf cleaner to see if I can detect any vacuum leaks. I couldn't find any leaks, and after the reset it runs beautifully again. Here we are another 50 miles later and the CEL is on, idling at 1k, and wondering if I made a mistake by putting the CAI on after the muffler delete and wondering if I absolutely need a tune. Any ideas? thanks, Keith