So you don't feel that the TPS could be the culprit? I should mention that if I am in nuetral and I raise the RPMs slowly @ about 1500-2000 there is a most pronounced stumble. Addingg to my suspision. As for the filter I have a conical filter that is relatively clean. As for the fuel filter. It was done not to long ago.

Green 96 mystique gs 4cyl mtx 16.9 in the 1/4 mile @102500 miles 95SE in Midnight Red MTX MSDS headers and y-pipe SVT exhaust SVT UIM Optimized se TB. Full pre 98 SVT body kit 15.741 @ 87.73mph :)