If your car ran fine before the K&N and only acted up after the new air filter was installed, most likely its from the oil particles mucking up the MAF sensor. Try using a MAF cleaner sold at auto stores or get a new MAF sensor. It happens more than you think and this is not so much mentioned in the K&N ad.
I use an oem air filter, works the best, and I also just changed my MAF sensor from a CEL P1128 code saying the left bank running lean. After installing a new MAF sensor and resetting the CEL with a OBDII scanner, it solved my problem. No lights for 2 months and the car runs like new.
Best
|