[Ed Wright]

You would be extremely lucky to find a dead spot on the TPS wiper with a volt/ohm meter. They are too slow. What you see on a digital meter is not real time. It is data frames, like frames on a movie film. The update rate with a meter is so slow, sweeping the TPS usually falls between data frames. You would have to move the throttle lever VERY slow to catch it with a meter. Thing to use is a fast digital lab 'scope. I always used a Fluke 98A. Very fast. Still need to sweep the TPS 15 or 20 times to be sure there is no issue there.

Stock fuel systems will hold fuel pressure a long time after the key is shut off. Factory fuel pumps have check valves. Not so aftermarket race pumps. My Aeromotive system drops pressure quickly. I wait a couple seconds after turning it on to crank the starter. Much shorter crank times if I wait for fuel pump to get the pressure up.

Problem is likely TPS, MAP related, or a tuning issue.