Okay i have 2 things to mention. When i go to wash my car it's always covered in this black ash crap or something, it comes from the exhaust! Now, is this normal or what cuz it's been bugging me since day one! The other problem i have is the car did idle fine and recently it started idling really low, like almost at the zero point. What causes this and is it bad or normal? I have a 92 vx hatch with a B16A swap with a chipped p28 ecu, AEM CAI, 2 1/4 inch piping for my exhaust, magnaflow cat and magnaflow muffler, stock header and stock everything else! What do u guys think is the problem?? thanks