ok tonight i went for a ride and did a few drifts and as i was leaving my car felt a little strange.i got home and i was reving the car because i thought i heard an exaust leak.then i hear a knocking sound coming from the engine and im not sure what it is.it doesnt do it at idle but the higher i rev the louder it is.the only thing i can compare it to is this video. YouTube - KA24DE Death Rattle and it only does it at like 1100rpm and higher. does anyone know what this could be.any help would be great i really dont want my motor to go.o yea its a 1992' ka24de.