LS2: Throttle Position (SAE) % vs. ETC Position %

[Tim05GTO]

I did some logging today on the GTO and found that the default TPS reading goes from 18% at idle to 88% at WOT. I pulled up ETC Position % and that reads 8% at idle to 100% at WOT.

The later seems to make more sense. Which one should we be using?

Thanks,
Tim

[Chris@HPTuners]

the ETC one. GM set the ouput of the SAE TPS PID to be absolute voltage %. I dunno if the SAE changed their spec or GM changed their interpretation.

[Tim05GTO]

Thanks!

[Joe6pt0]

Thanks again, I found this out yesterday while logging and seen 88% at WOT and thought that GM limited the opening to 88%. I spent hours looking around for a parameter to change this last night lol.

[CHEVRACER83]

so does ht know your actually getting 100% throttle or are all the setting gonna be off according to the displayed 87% tps?

[Street Legal]

TPS % on the LS2 will only go to 88 so you have to log ETC % to show 100

[BBA]

Have you guys found a way yet to get the full 88% TPS out of a Vortec LS2?