When I log w/ Evoscan, my TPS doesn't go to 100% right away when I floor it. It goes to about 75% and then slowly climbs to 100%. When logging w/ both ECU TPS reading and Zeitronix TPS reading, sometimes the Zeitronix readout climbs a bit faster, but not much. Is this common when logging? If not, do I have a logging issue, or do I have a bad TPS?

Here's a pic of a log. The zeitronix reading shows up a bit later then the ECU reading, so they're offset:

Logging too much stuff on evoscan can cause a loss in frames/sec and cause a lag. Also if ecuscan doesn't show 100% then the formula used might need adjustment.

well, it *does* show 100%, it just shows up like I'm slowly pushing it in to WOT when I'm actually flooring it right away. It doesn't act like a lag issue (all the other values react like they should.) I'll try to log just TPS to see if there's a difference, but i don't think it's lag.

I'd try watching the logger's TPS reading alone with the car not running. Smash the pedal to the floor while watching how the logger reacts. Mine show's 100% almost instantly if i remember right. I'll double check when I get a chance to run out to my car (at work now).

Check voltage coming out of the sensor at the TB when you open it up to WOT. If it goes up fast and then keeps climbing at a slow rate up to max, then it might be a TPS or wire issue.

I'll do both of those tests when i get a chance and come back here w/ results. LOL i'm so lazy, should have done them already, but just posted here looking for an answer instead.

Well I checked mine by just watching the loggers response to me pressing down the gas pedal and it shows 100% instantly. The only real way is to test the actual voltage output like Sam said.