Ive had a weird problem from the begenning with my new engine. I adjusted the TPS to anywhere between .4-.7 Volts trying to find a sweet spot. At random times (more when the engine is cold), it will rev up a few hundred rpm. I look at my scanmaster and see that the tps voltage is still good, but tpp has been anywhere from 01-20% (usually 01-10%) while at idle What the hell would make it think its up to 20% throttle when the tps voltage is only .4-.7? Could I have a problem with the tps where it is varying voltage so fast the scanmaster cant keep up with it? Or is this inside the pcm?

 

How long does the 1-20% TPP spike last? Is it possible that you have a poor connection at the connector, or a dirty TPS rheostat that is causing brief spikes in the TPS voltage? With the ScanMaster not being able to display both the TPS and TPP simultaneously, is it possible that the TPS voltage spike has simply disappeared by the time you can switch the ScanMaster display from TPP to TPS (can't remember the exact sequence of the display)?

 

Its not just a % spike. It will stay that way till I turn off the engine. Then usually when I restart it it goes back to 0, and sometimes stays.

It goes from TPS to TPP. While the engine is revving itself, the TPS voltage is perfect. Push the scanmaster button once and TPP is up.

I did have a loose wire, and I reconnected all three of them a few inches from the connector. I know they are good connections though. Maybe Ill just replace the connector (I think they sell the connector with a pigtail), and sensor and see what happpens.

 

It was the TPS sensor. I dont know why because it always worked fine. Maybe there was a bad spot in the pot where the old TB never got to. I slotted a new TPS, adjusted voltage, and all is good