HI EVERYONE,NEW TO THIS SITE,AND I HAVE A PROBLEM. I HAVE A 2000 MAXIMA V-6 AND IT HAS A HARD TIME TRYING TO IDLE.IT DOES HAVE A CHECK ENG.LITE ON AND THE CODE IS PO505 IDLE AIR FAULT.I DID TAKE IT OUT AND CLEANED IT AND ALSO THE THROTTLE BODY.AFTER REINSTALLING IT,IT DID RUN BETTER,BUT AFTER I SHUT THE ENG. OFF AND IT SITS FOR A MINIUTE OR TWO,IT WILL START AND STALL AGAIN,JUST LIKE BEFORE I DID ANYTHING TO IT.CAN ANYONE SHED SOME HELP.THANKS IN ADVANCE FOR ALL YOUR HELP.