Anyone know what could cause the A/C to not cool as well under moderate to heavy throttle. My A/C has just started doing this, under acceleration it will blow out warmer air and when sitting still or cruising it will blow cold air. Could it be low on freon?

 

The compressor will kick off at WOT. Does not sound like low freon. Does it keep blowing at the same velocity?

 

yeah, it blow's the same no matter what. what worries me is when driving normal it'll do this when pulling a moderate hill, not at WOT. it has just started doing this.

 

Im not sure of the problem. It seems that for some reason the PCM is telling it to disengage. You might do a search for A/C clutch 'air gap'.

If it gets too hot, just go fishin......

Bump!

 

Yeah you might want to check the gap in the Air clutch...Sounds like it may be getting worn long.

Its an easy fix....The gap needs to be around .035. Pull the 1 bolt in front of the compressor and get a washer off the shaft to bring it back in range when re-installed.

 

Thanks for the tip.

I'm deffinately doing some fishing today!!

 

Thanks for the tip guys, i did a search and found that article that Springerpop wrote. I'm going to give it a whirl today!

 

yeah, check the gap first. if that doesn't cure it, get a good set of gauges and check the freon level.

mine did that, and i ended up putting in a complete new system. f**ds are notorious for that.

 

I had the same issue on my old PSD, did SpringerPop's fix and it solved the problem. This was after I did a freon change...

 

I'll do the fix tonight and let you guys know what it did for me, hopefully fix it!

 

I'd check the freon charge first with a set of gauges. I have an '02 and I have never been able to run in Max A/C on the highway. I've worked on a/c and refrigeration for years and did a lot of tests. When the rpm on my truck is above 1500 and the cab temp is at about 78 degrees, the low pressure side goes to 23psi which is at the cutout point for the low pressure cutout switch.

That low press cutout switch is there to protect the system from freezing. When you get your gauges you'll see that 23 psi is about 30 degrees F iirc. I just didn't feel like messin' with it so left it like that for years. I now see some clues after running for years that the accumulator may be the culprit. I'm going to change it out soon and see if I can finally run on Max a/c without the compressor cutting out when on the highway or above 1500 rpm. It really does suck to not be able to use Max a/c, well, I could use it but what's the use, it doesn't cool the truck down any better then Normal setting because in Normal setting, the compressor will keep running because the fan is sucking in outside warmer air and this keeps the low pressure side higher.

Anyhow, your symptoms are the same as mine, let us know what you find out.

 

update - sorry for so long, been busy, but took one of the gap spacers out and the a/c's blowing ice cold all the time now!!


Thanks everyone!