can someone answer this please that I got PM'd in regards to a K&N filter i just sold to this dude.
i put in the filter, then i was driving outa my street and the car started reving high and black smoke started comin outa the exhaust. then i stopped and the car idles at 2000rpm and it shakes. then when i turn off the car it shakes like crazy.... what happend??? what do u think it might be??