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« on: December 23, 2009, 06:47:20 AM »
I had the same problem. My Snap-on dealer read my codes and the AFM and O2 was flagged. A new AFM is around 600 bucks, OUCH! I bought a serviceable Bosch AFM on Ebay. Believe it or not, once it got really cold here I finally noticed a crack in my intake bellows that I couldnt see previously. I taped it up as a temp fix until my new one gets here. Completely fixed my cold idle and surging problem! Under 30 bucks from Pelican. If you decide you want to replace your AFM, I have a spare. I would definitely try a new intake bellows before you spend any more money or time. Unless yours is new. It is the flexible link between the AFM/airbox which is solidly mounted to the body and the engine which naturally moves around a bit, especially at start up and shut down. Over time they deteriorate andstart to crack. I couldnt even see the cracks in mine until a couple days ago.