Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by:

A/C Q's

 
  #1  
Old 08-27-2008, 10:44 AM
03_PSD
03_PSD is offline
Postmaster
Thread Starter
Join Date: Nov 2006
Posts: 4,196
03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.
A/C Q's

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?
 
  #2  
Old 08-27-2008, 10:53 AM
joegebff's Avatar
joegebff
joegebff is offline
Gone Fishin for Mark
Join Date: Nov 2004
Location: West of Houston
Posts: 1,354
joegebff has a great reputation on FTE.joegebff has a great reputation on FTE.joegebff has a great reputation on FTE.joegebff has a great reputation on FTE.
The compressor will kick off at WOT. Does not sound like low freon. Does it keep blowing at the same velocity?
 
  #3  
Old 08-27-2008, 10:56 AM
03_PSD
03_PSD is offline
Postmaster
Thread Starter
Join Date: Nov 2006
Posts: 4,196
03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.
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.
 
  #4  
Old 08-27-2008, 01:53 PM
joegebff's Avatar
joegebff
joegebff is offline
Gone Fishin for Mark
Join Date: Nov 2004
Location: West of Houston
Posts: 1,354
joegebff has a great reputation on FTE.joegebff has a great reputation on FTE.joegebff has a great reputation on FTE.joegebff has a great reputation on FTE.
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!
 
  #5  
Old 08-27-2008, 02:00 PM
RckyMntnKng's Avatar
RckyMntnKng
RckyMntnKng is offline
Senior User
Join Date: Sep 2007
Posts: 197
RckyMntnKng is starting off with a positive reputation.
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.
 
  #6  
Old 08-27-2008, 02:03 PM
03_PSD
03_PSD is offline
Postmaster
Thread Starter
Join Date: Nov 2006
Posts: 4,196
03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.
Thanks for the tip.

I'm deffinately doing some fishing today!!
 
  #7  
Old 08-27-2008, 02:11 PM
03_PSD
03_PSD is offline
Postmaster
Thread Starter
Join Date: Nov 2006
Posts: 4,196
03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.
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!
 
  #8  
Old 08-27-2008, 02:27 PM
empiretc's Avatar
empiretc
empiretc is offline
Post Fiend
Join Date: Dec 2003
Posts: 5,140
empiretc is a splendid one to beholdempiretc is a splendid one to beholdempiretc is a splendid one to beholdempiretc is a splendid one to beholdempiretc is a splendid one to beholdempiretc is a splendid one to behold
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.
 
  #9  
Old 08-27-2008, 03:41 PM
Ponyboychris's Avatar
Ponyboychris
Ponyboychris is offline
Hit it!
Join Date: Jan 2007
Location: Centennial CO
Posts: 6,707
Ponyboychris has much to be proud ofPonyboychris has much to be proud ofPonyboychris has much to be proud ofPonyboychris has much to be proud ofPonyboychris has much to be proud ofPonyboychris has much to be proud ofPonyboychris has much to be proud ofPonyboychris has much to be proud ofPonyboychris has much to be proud of
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...
 
  #10  
Old 08-27-2008, 03:43 PM
03_PSD
03_PSD is offline
Postmaster
Thread Starter
Join Date: Nov 2006
Posts: 4,196
03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.
I'll do the fix tonight and let you guys know what it did for me, hopefully fix it!
 
  #11  
Old 08-27-2008, 08:17 PM
greg_23805
greg_23805 is offline
Senior User
Join Date: Sep 2002
Posts: 134
greg_23805 is starting off with a positive reputation.
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.
 
  #12  
Old 10-02-2008, 01:59 PM
03_PSD
03_PSD is offline
Postmaster
Thread Starter
Join Date: Nov 2006
Posts: 4,196
03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.03_PSD has a great reputation on FTE.
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!
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
deathinc_7
Modular V10 (6.8l)
4
08-19-2012 09:13 PM
race39
1999 - 2003 7.3L Power Stroke Diesel
3
03-29-2012 11:59 PM
sportsmansteve
Cooling, Heating, Ventilation & A/C
5
07-20-2011 10:28 PM
twg1966
Escape & Escape Hybrid
5
06-19-2011 12:16 AM
918eva
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
05-24-2010 09:16 AM


Thread Tools
Search this Thread
Quick Reply: A/C Q's


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.