I have this issue when cold starting. Usually when the car starts up it revs to about 1.5 and stays there for a while and then gradually goes down. Lately, the car will only go to 1.2 and it seems to drop and then it will rise again. It seems like it is very weak and unsteady. I took the car to the dealer and they said it was the MAF in my Injen CAI making the problem. I have had my MAF for 1.5 years now. I did have the car tuned in August with uprev. This occurs both in my custom and stock maps a month or so after the install. Any suggestions to what is happening? Thanks.