Been battling reduced engine power issues in my 05 Silverado for almost a month now - has been a P1516 regularly, but have received P0068 and P2135 - and I can't find the voltages for the pedal and throttle body to watch/log to see what the issue could be. Pedal percentages haven't shown any issues, and usually cuts off at idle - so i don't think I'm hitting the upper airflow limit, and table is maxed anyway.
Thought I had it fixed as I hadn't had it pop up in the last week and a half, but cut off at highway speed last night with cruise engaged, which is a new failure mode.
I threw a bunch of parts at it while on the Hot Rod Power Tour and after to try and fix and keep going, but nothing has fixed it. TB, TAC module, x-link, pedal. Wiggling the harness, connectors will not make it happen - eight pin connector at throttle body has been verified good. Redid all the grounds, added grounds, no change.
Setup is a 102 bbk housing with a gold blade Camaro actuator, X-link. Got REP with this TB and the regular 87mm gm truck TB that was on the truck for a year. Actuator on current TB was on 90mm gm TB for six months before upgrade to 102. Cam is healthy solid roller 241/249 @ .050.
Anyway, I'd like to be able to log voltages for pedal and throttle body so I can properly diagnose it instead of throwing parts at it and hoping. Any other help would also be appreciated.
Thanks,
Ryan