a/c compressor problem
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From: Spring Texas
a/c compressor problem
I have a 2002 f-350 power stroke diesel and the a/c compressor shuts off at low rpm, like when you exit the freeway. It runs fine at all other rpms, just not whent the rpms drop off to idle. Can any one tell me what the problem is?
Hotshot
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From: St Louis
Have you determined 100% that the clutch is disengaging as described?
Have you measured your clutch air gap? Tried hitting the clutch face with a mallet or broomstick while at idle to see if the clutch pulls in?
Steve
Have you measured your clutch air gap? Tried hitting the clutch face with a mallet or broomstick while at idle to see if the clutch pulls in?
Steve
Fleet Mechanic
Joined: Feb 2006
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From: Lorain County, Ohio
"The a/c cools fine at highway speed and at low speed, just when you go from high rpm to low rpm the compressor shuts off."
I'm starting to wonder if this isn't built into the clutch operating logic in the PCM for some reason. It seems to be cooling well, if I'm understanding things correctly.
How do you know the compressor is cutting out. Have you actually seen it, or does the vent temp go up when you decelerate, causing you to assume the compressor is cutting out.
I'm starting to wonder if this isn't built into the clutch operating logic in the PCM for some reason. It seems to be cooling well, if I'm understanding things correctly.
How do you know the compressor is cutting out. Have you actually seen it, or does the vent temp go up when you decelerate, causing you to assume the compressor is cutting out.
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I have same problem with 2001 f250. When engine starts, A/C cools just fine. After few minutes at low RPM it shuts off. I step on the gas for higher RPM, the A/C comes on fine for few minutes until the RPM start going down again.
When I hit the clutch with a broomstick the clutch re-engages and A/C starts cooling
When I hit the clutch with a broomstick the clutch re-engages and A/C starts cooling
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Originally Posted by isaadidin
I have same problem with 2001 f250. When engine starts, A/C cools just fine. After few minutes at low RPM it shuts off. I step on the gas for higher RPM, the A/C comes on fine for few minutes until the RPM start going down again.
When I hit the clutch with a broomstick the clutch re-engages and A/C starts cooling
When I hit the clutch with a broomstick the clutch re-engages and A/C starts cooling
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Joe Kucinski
Fleet Mechanic
Joined: Feb 2006
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From: Lorain County, Ohio
Originally Posted by isaadidin
I have same problem with 2001 f250. When engine starts, A/C cools just fine. After few minutes at low RPM it shuts off. I step on the gas for higher RPM, the A/C comes on fine for few minutes until the RPM start going down again.
When I hit the clutch with a broomstick the clutch re-engages and A/C starts cooling
When I hit the clutch with a broomstick the clutch re-engages and A/C starts cooling
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Joined: Nov 2006
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From: Easley, South Carolina
Originally Posted by lsrx101
That's caused by the clutch gap being too wide. Remove the center bolt, slip the clutch plate off and remove one of the shims between the plate and compressor shaft. You want less than .020".
Thanks
Marc
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Joined: Jan 2004
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From: St Louis
Originally Posted by nutfarmii
lsrx101, how do you get the clutch not to rotate while trying to get the 8mm bolt loosened? Do you need a special tool to hold it down or would a block of wood and a large c-clamp work?
Thanks
Marc
Thanks
Marc
Steve
Last edited by projectSHO89; Aug 23, 2007 at 08:01 AM.
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When I took my clutch plate off to remove the shim I turned the A/C switch on and turned the key on do not start the engine. That will hold the plate from moving while you loosen the center bolt. Then turn the the key off and take the clutch plate off. When you get ready to tighten the center bolt turn the key back on to keep the plate from moving.
Jim
Jim
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Joined: Nov 2006
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From: Easley, South Carolina
Thanks to both Jim and Steve, got the clutch plate off and removed 1 shim retightened took her for a spin 2.5miles parked it and retightened the bolt took one more spin checked the bolt and its on tight and appear to have nice frosty air. Will update tomorrow afternoon when I get off work as the true test appears more when we hit 95+ degrees in the afternoon.
Appreciate everyone's input.
Marc
Appreciate everyone's input.
Marc
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