SR20DET irratic idle

My 240 is running like crap. It has an irattic idle (500-1500-500-1500) and is running rich. I pulled my plugs and they were all black. I cleaned them up and it ran ok for 5 min. and then it started to run like crap again. I think either I have a boost leak, oxygen sensor is bad or my MAF sensor is bad. Does anybody have any other ideas on things to check?

HD 724-925-2660 Jay

check your PCV Valve!!! my shelby did the EXACT same thing when my PCV valve came loose

Im putting money on a Vac leak. so check the PCV

Iac

do,listin to a boy that cant fix his (wheaterexcuse)timming! :rolleyes:

woooooooo tech hotline!!

Given that you’re running really rich and having idle problems i’ll put 5 on maf.

Are you recirculating or venting your bov? If you are venting then that can cause major probs at idle unless you have a super stiff bov spring (and that usually causes compressor surge too). Does it run ok once you are off idle? If the maf was bad then it won’t want to rev over 3k.