LS1 TPS/IAC Adjustment
 

Whats needed to do to make sure what the TPS is at is where the tune needs it to be?

IE, does the PCM/tune want to see a certain voltage at 0% TPS and 100% TPS?

These cars I believe is around 0.5 at 0% and 4.7ish at 100%

I played around with grinding the throttle body stop to get true 100% throttle

I don't think it seeks an absolute value though, it knows a base and then references from that to know the %

TPS is not adjustable, just set the blade and perform the re-learn. The factory stop is adjustable on an LS1 TB.

-Dave

I am an OLSD tune, so I need the TPS to read exactly what the car was tuned for originally. At least I think so.

TPS won't affect SD, you're thinking Alpha N fueling which derives fueling from throttle position. Your fueling is based off of manifold pressure and rpm. TPS would just correlate to your IAC and idle performance.

-Dave

Ok, so what do I set the blade to?

(plan is to grab HPT, and just watch the TPS%, then get it to read zero.)

You want your IAC counts around 40 at warm idle, then reset the TPS.