8Rape

When I bought my car it had one of those crappy k and n typhoon intakes on it. I finally got my hands on an oem set up out it on and now the car won't idle. The only code I'm getting is p0171 (bank 1 lean). Which points me twords a vacuum leak but I can't find any with carb cleaner nor do I hear any. I have swapped in a different maf with no change. It just baffles me how changing an intake can cause me so many problems. I even tried to put the k and n back on with no change. I've reset the ecu several times and even tried a different tune with my Cobb. Am I missing anything obvious here?

8Rape

Forgot to add the car is completely stock except for Meghan Racing Test Pipe and Exhaust.

dannobre

iTrader: (3)

Check that the VFAD nipple is blocked off. It is on the plastic intake close to the oil dipstick. Little nipple should be plugged. Check the MAF o-ring as well

8Rape

Wow good call the vfad nipple was open. My only question is why was it never a problem before now? As far as I know it's never been plugged since I have owned the car.

dannobre

iTrader: (3)

LOL...hard to say. Likely the car was able to compensate before you went back...maybe because the K&N screens suck. The OEM screens and intake are likely much more accurate at idle. The differences in the intake tube dia and a few other issues could have played a part as well

8Rape

Just got back from a spirited drive. The idle is solid, and noticeably smoother than the other intake. The intake temps are a good 60 degrees cooler now also. Thanks for the quick reply and for the help.

Loki

iTrader: (1)

lol. Ouch. If ever there was an argument against the K&N intakes...

Glad you got her fixed!

8Rape

165 degrees on a 74 degree day.