A/C problem related to tuning/wiring
Thread Starter
Joined: Sep 2004
Posts: 4,905
Likes: 906
From: Stockbridge GA
A/C problem related to tuning/wiring On a 2002 Silverado 4.8 with an old sidemount whipple setup, there was never a problem with the A/C. It was tuned with 8.1 marine 42# injectors to delete the whipple computer, and had flexalite fans with their notoriously bad controller. Fast forward a few years to converting to a 2bar sd tune, but keeping the MAF since it wasn't maxed out, and wiring the efans through the pcm. To simplify things, the two fans are just wired as fan1 off/on instead of fan1/fan2. The A/C now cycles on/off in park/neutral, but works perfectly in gear. I will figure this out and post a resolution at some point, but for now I'm a bit confused, because during some RTT idle tuning with HPtuners, I made an idle airflow adjustment and the A/C clutch quit cycling off. I thought I may have been on to something, but the corresponding permanent change in the tune file did not change the problem.
Might look at the stall saver stuff and "unstable idle" load
shedding, which will (has, for me) cut out the A/C at idle
in this sort of unpredictable way.
The eventual answer is probably to get the idle cleaned up
(stability-wise) but in the near term you may need to kill
these "hidden actors" to get to where it's not being made
more unstable by well intentioned crap.
shedding, which will (has, for me) cut out the A/C at idle
in this sort of unpredictable way.
The eventual answer is probably to get the idle cleaned up
(stability-wise) but in the near term you may need to kill
these "hidden actors" to get to where it's not being made
more unstable by well intentioned crap.
Thread Starter
Joined: Sep 2004
Posts: 4,905
Likes: 906
From: Stockbridge GA
Might look at the stall saver stuff and "unstable idle" load
shedding, which will (has, for me) cut out the A/C at idle
in this sort of unpredictable way.
The eventual answer is probably to get the idle cleaned up
(stability-wise) but in the near term you may need to kill
these "hidden actors" to get to where it's not being made
more unstable by well intentioned crap.
shedding, which will (has, for me) cut out the A/C at idle
in this sort of unpredictable way.
The eventual answer is probably to get the idle cleaned up
(stability-wise) but in the near term you may need to kill
these "hidden actors" to get to where it's not being made
more unstable by well intentioned crap.
