First off i have a 99 f250 v10. My mass air flow sensor is going out and i was wondering if anyone has used any aftermarket mass air flow sensors? And did they make much of a difference? Also Where is the cheapest place to buy the OEM MAFS and a good place to buy a aftermarket MAFS. Thanks for any advise.

 

I just changed my mass air flow sensor, but its still doing the same thing. It idles up and down when it is in park or stopped with my foot on the brake. When i unplug the mass air flow sensor it smooths right out. Does anyone know what the heck is going on?