+1 on the "cool it down" advice. Pick up a can of R-134 refrigerant and a can tap, and hose the module down with liquid Freon by holding the can upside down and opening the tap when the stumble begins. If the performance improves for a short time, you've found the problem. Keep your fingers out of the spray- - - - -it's about 40 below zero!
Jerry
Last edited by Hotrod Lincoln; 01/27/2010 6:22 PM.