That's the cheapest hp mod I will ever do. After reading some of the posts about cleaning/replacing the MAF, I decided a cleaning wouldn't hurt anything. I had a little rough idling when cold, and some jerkiness when driving slow in first.

What a difference. I thought the car was fast before, but holy crap. Much smoother and quieter at idle, and the Throttle response is much quicker.

If you haven't done this recently, give it a try.

 

Several years ago I had similar cold idle and cold running issues. I cleaned my MAF and it cleared everything up. I haven't had any problems since then.