Dose anybody got this issue like me?? i've been noticed that i have had heard some knocking noise after i shut 0ff my engine..what was that noise?it sounds like the pistons is hitting the enigne wall...??or a part of engine is hitting the metal body chasics..??also i smelled some bad s*** from the intake pipe where u see it when u poped the hood. i look through the hole on the intake pipe where u c the MAF sensor. all these gray ashes were all in the pipe?? its brand new car only 5k miles on it..!!i believe it happened after the INJEN CAI installed..with that knocking sound....!!!