sac811
September 15th, 2013, 05:40 AM
1. So have A/C working since I last posted this thread: (1999 GMC Sierra 1500 rcsb orignally 5.3, now cammed lq9)
http://forum.efilive.com/showthread.php?23141-Got-ECU-working-and-truck-is-running-after-full-flash-but-now-A-C-doesn-t-work-Help
The problem was the high pressure switch connector on back of compressor. The prongs got bent down when I first installed that connector back. Bent the prongs back correctly and reconnected it.
Now A/C works, but wont kick on at idle, only around 1500rpms+.
From everything I read previously this is a tell tale sign of low freon.
But I brought the truck to a mechanic I know and he said it is usually the opposite (low freon works at idle, but cycles clutch at higher rpms).
So I'm trying to find out what to do from here.
He used his Snap On scanner and said everything shows working fine, it just kicks the compressor on for 1ms and turns it right back off at idle.
He checked pressures etc. and said all was fine.
I'm still leaning towards low freon, what else could it be?
2. One other thing, my air recirculation actuator had been brocken for a while before doing motor swap because the gears were stripped and just clicking.
I replaced that actuator and now it will open and close that door, but gets to its end and just keeps clicking.
When I first installed it, it worked fine, then 15 minutes into use it just started clicking with no change in recirculation button.
How do I get this to stop? Or is it something wrong with my HVAC controller not seeing it correctly, and maybe it broke the original because something is going out on it, since its doing the same to a new one?
Thank you
http://forum.efilive.com/showthread.php?23141-Got-ECU-working-and-truck-is-running-after-full-flash-but-now-A-C-doesn-t-work-Help
The problem was the high pressure switch connector on back of compressor. The prongs got bent down when I first installed that connector back. Bent the prongs back correctly and reconnected it.
Now A/C works, but wont kick on at idle, only around 1500rpms+.
From everything I read previously this is a tell tale sign of low freon.
But I brought the truck to a mechanic I know and he said it is usually the opposite (low freon works at idle, but cycles clutch at higher rpms).
So I'm trying to find out what to do from here.
He used his Snap On scanner and said everything shows working fine, it just kicks the compressor on for 1ms and turns it right back off at idle.
He checked pressures etc. and said all was fine.
I'm still leaning towards low freon, what else could it be?
2. One other thing, my air recirculation actuator had been brocken for a while before doing motor swap because the gears were stripped and just clicking.
I replaced that actuator and now it will open and close that door, but gets to its end and just keeps clicking.
When I first installed it, it worked fine, then 15 minutes into use it just started clicking with no change in recirculation button.
How do I get this to stop? Or is it something wrong with my HVAC controller not seeing it correctly, and maybe it broke the original because something is going out on it, since its doing the same to a new one?
Thank you