Nissan 370Z Forum - View Single Post - Does Stillen Gen 3 CAI cause you to run lean?

cameronZ · 05-12-2016, 10:47 AM

Yeah man after I threw those on I started getting some black soot coming out of my exhaust tips. They throw off your AFR ratios a bit because they move the MAF sensors. During my tune they said I was a bit lean. Running lean can theoretically cause engine damage. But again, it depends how lean you're running and how hard you push your engine. If I were you, id wait until I had the money to do the tune as well or I would just get some drop ins and get like the AAM midpipe, you'd have a full catback with test pipes and you wouldn't need a tune.

05-12-2016, 10:47 AM	#3 (permalink)
cameronZ Base Member Join Date: Mar 2016 Location: Spokane, WA Posts: 25 Drives: 2010 370Z 40th Rep Power: 9	Yeah man after I threw those on I started getting some black soot coming out of my exhaust tips. They throw off your AFR ratios a bit because they move the MAF sensors. During my tune they said I was a bit lean. Running lean can theoretically cause engine damage. But again, it depends how lean you're running and how hard you push your engine. If I were you, id wait until I had the money to do the tune as well or I would just get some drop ins and get like the AAM midpipe, you'd have a full catback with test pipes and you wouldn't need a tune. __________________ 2010 Nissan 370Z 40th Anniversary. Stillen G3 Intakes. Motordyne ART Pipes. AAM Short Tails. Uprev.