Originally posted by Big Jim:
There is a know problem with hot air effecting engine performance when using an open element air filter. Some have built an air dam around the air filter intake to block out hot engine bay air. It usually doesn't show up until the weather is much hotter though.




This is my vote also.

96 Contour SE Duratec V6 24-valve 2.5L ATX 108,000 mi. Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil