Quote:
Originally Posted by nickw14
*off topic, this is my first post!*
So I bought a K&N cai for my FR-S a few weeks ago ( This one). I had my roommates help me install it, since I had never done anything like that before (It was really, really simple and I practically redid the installation for reasons I will soon explain). Turns out, they didn't screw the MAF sensor in all the way, and left the coupler really loose around the intake pipe, triggering my check engine light several times.
Anyway, after I fixed those problems, everything appeared to be running fine. However, recently I have noticed some strange things happening. First of all, my mileage has decreased. I went from averaging 28 in the city to averaging at BEST 26; I am hovering right around 25. Second, when my rpms hit about 3k they drop down to like 2.5-2.7 regardless of whether or not I am staying on the gas. Any ideas as to why these two things may be happening? Maybe I am just inadvertently driving a little harder (hence the mileage) and the rpm dips are completely normal?
Note: I have an automatic transmission, but use the paddle shifters all the time. I'm wondering if that has anything to do with the rpm drops? |
Sounds like
1. MAF sensor not installed correctly or air leaks.
2. MAF sensor damaged or dirty, try cleaning with maf sensor cleaner
3. You may need to rescale MAF sensor due new intake, this is generally required if the diameter of the intake tube differs from the stock size or the intake changes the flow around the MAF sensor
see here
http://www.ft86club.com/forums/showthread.php?t=64790
You car will generally run with a changed intake but if maf scaling is effected or airflow arround maf is turbulant ir will run a bit rich/lean and may exhibit some drivability problems like your experiencing.