Thak you for all the suggestions. I did order the MAF on EBay but I'm wondering if the problem could be something else. I idled the engine without the air cleaner the other day and it was after that the check engine light and code P0100 appeared. If I disconnect the battery andclear the codes I can start the engine and drive with no problem and no check engine light. On the second restart the light will come back on and I get an occasional stumble accelerating from a stop light. Could this be something other than the MAF?

Bruce