Not that I recommend doing this but, you can tap on the MAF with the handle of a screwdriver and see if the idle changes. If you do go to the junk yard for a MAF, make sure and leave the upper portion of the air box on. This makes for a quick swap in the junk yard parking lot. My mechanic also told me to make sure the part numbers match up on them, not sure if the auto got a different one from the 5 speed.