Hi guys Im running a K&N typhoon (thanks Brian) catless mid pipe and axle back. Car pulls AWSOME in every RPM and gear. My question is Am I running lean? I dont think so, cause I still get a black muffler tip after a few days which tells me the car is running somewhat rich.. What is your input? I basically have the SPT stage 1 mods. I really like what these combo parts did to my car. !!!!!
tail pipe carbon deposits is not good enough an indication. You may run rich on certain times but lean and others and depending on when it is lean it may be ok or it may be not (too many maybes). A tune will fix that Do you have EGT sensor ?
:werd: A wideband would also be a way to find out if you know anybody with one. Some brands cause variable lean conditions and some are ok (Cobb SF, TXs) .. I dunno about the K&N intake.