Originally Posted by bobfred44
I had the exact K&N filter issue. Replaced the MAF and no issues until this weekend. Started the car in 12 degree weather and idled like crap. Idling now ok and running ok but check engine light still on. Is this possibly due to extreme cold weather?
My post was in reference to the aftermarket intake causing turbulence with the MAF. (and cold/denser air may tend to cause more turbulence in an aftermarket intake that already has turbulence-MAF issues) And I added a note about being cautious not to over oil the K&N filter.
If you only have a K&N drop in filter, put into the OEM intake: Then I don't see air temperature being a variable. You probably still have to much oil on the filter and it is just coincidence that it FUBARed your MAF again. You should be able to just pull the MAF and clean it out real good with MAF cleaner. Be sure it is dry before you reinstall, and keep track of which way it came out, so you put it back in the same direction.
Or: Perhaps you have a cold temp sensor acting up in the engine (unlikely-but if bad may cause bad idle when air temperature is cold) Get the codes read, and that will tell you more. Or just clean up the MAF and see if the engine light goes away and you don't have a repeat of the problem. (and dry out that air filter some more)