Could it be the tuning?!?!?

I am just kidding.

 

Possibly but then chrism400 which has my mail order tune, same mods, slightly smaller cam and also a cheap 2500 stall (difference being in that he has 3.89 gears) just recently ran a 12.36 @ 111.

 

Sounds like a linkage issue. I know my TPS reads 100% about a 3/4" from the pedal stopping on the floor, and 0 at idle.

 

It's your stall converter. I had the same problem . I got a vig2800 stall. Now it tach's right up. The extra money was well worth it. It's the only stall I would buy again. Well I would buy a Yank too. Both great converters...

 

I'm confused...how can it be the stall?? The PCM simply reports the sensor position, if it's not getting to WOT instantly, then you either have a bad sensor, it's hanging up/cable issue, or the PCM has a problem. It doesn't matter what the engine or drivetrain are doing. Stock cars get to 100% as soon as you slam the throttle, as does every other car I've ever Diacom'd, with or without a different stall. If you floor it, the car could die and the TPS value should still be 100%. They're independant as far as that's concerned...