In park if i rev the car up once it hits about 2000 rpm you can feel something like the engine is missing but its more like a bang bang bang. Then if u let go of the gas at 1000 rpm it goes CLICK really loudly and the car rolls back 4 or so inches. My dad listned to it he doesnt think its a backfire. Im not to sure tho....anyone else had this problem.... its done it since i bought it ive put 3000 miles on the car since and replaced the plugs and wires with AC delco plugs and pro spark wires, it also has a new MAF sensor installed last week.

my car did somethin liek that...if you press the gas in park it like clicks sometime...not all the time...persont aht did my vavle covers...said he thought it was backfiring through the intake...but who knows...my car doesnt roll though