[Walt Fricke]

My major mystery with this system on my 2.8L race motor was due to the TPS. If it started at, say, 1V, on depressing the pedal it would drop, say to 0.5V. This was most pronounced driving the car, where there was a load. Needless to say it was hard to get it going, but when I coaxed it out onto the track, where the RPMs never fell below 3,000, it worked OK.

Why the potentiometer behaved that way was a mystery, but the solution was to make, say 1.25V be the nominal "closed" position, with what WOT measured as the WOT position, and let it draw the line between those two points.

In fact, with advice I hogged out the mounting screw holes in the TPS so it could be rotated away from what seemed a bad area. In the fullness of time I spent a lot of $ (for the TWR TBs it is some slightly rare German Ford part) for a new one. It had much the same characteristics, but at least I was looking for something like this.

Yours probably is fine, but one more thing to check - if the throttle or the sensor does not always return to the exact same place, that might cause your hesitation?