AC problem during load. - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 09-03-2007, 07:44 PM Thread Starter
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AC problem during load.

This weekend while pulling my trailer I noticed that my ac stopped working when I would get under a load or during higher rpms. When I let off the throttle or come to an idle when stopped the air would get cold again. When I accelerate hard the air will go from cold to warm. Later when I got home I checked the compressor while the truck was parked. I had the wife rev the truck up while watching the compressor. When the truck was above 2500 rpms the compressor was kicking off an on about every three seconds. I have done a ton of searching and wondered about the air gap but my problem sounds just the opposite of that one. Any thoughts. The air gets real cold when it is working.

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post #2 of 15 Old 09-03-2007, 09:52 PM
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I don't have a answer for ya but my 99 F550 roll off does the opposite it has cold ac for a little while then it will stop working. If I pull over 2500 rpm's the ac clutch grabs and it will freeze ya out of the cab ... get off the highway under 2500 rpm and it wont work again...I still haven't figured out if I need a clutch or if there is another problem such as low refrigerant

hope you get it figred out soon...Im gunna look at mine this week sometime when its not on the road

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post #3 of 15 Old 09-04-2007, 02:25 AM
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We have a '98 Ranger that does the same thing. I think it is a vacuum issue, but I have not looked for a cure yet.

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post #4 of 15 Old 09-04-2007, 03:07 AM
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the problem is the air gap on the compressor is to wide and under load it lets go, take the 8mm bolt out of the end of the compressor and take the shim out and put it back together and it will be fine

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post #5 of 15 Old 09-04-2007, 05:47 AM
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what is the air gap supose to do? that sounds like what my truck has been doing, under acceleration it will stop cooling, when you get back to crusing speed or idle its cold

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post #6 of 15 Old 09-04-2007, 06:24 AM
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Quote:
Originally Posted by quick26 View Post
what is the air gap supose to do? that sounds like what my truck has been doing, under acceleration it will stop cooling, when you get back to crusing speed or idle its cold
isnt yours a 6.0

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post #7 of 15 Old 09-04-2007, 06:29 AM
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yeah, is mine set up differently on the ac?

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post #8 of 15 Old 09-04-2007, 06:42 AM
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yes totally different , i bet your problem is that the freon is low , there is a bulletin out that the label under the hood isnt the correct amount of freon

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post #9 of 15 Old 09-04-2007, 07:02 AM Thread Starter
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I will have to look into the gap issue. I was going to check the gap but I had read up on it and thought it was only a gap issue if it died while on the lower rpms. I am going to try it tonight. Anyone know how much gap the clutch should have.

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post #10 of 15 Old 09-04-2007, 07:34 AM
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Quote:
Originally Posted by SCUFFY828 View Post
yes totally different , i bet your problem is that the freon is low , there is a bulletin out that the label under the hood isnt the correct amount of freon
would it be updated in alldata? if so i will pull it up this afternoon and check it. i have access to alldata and ac equiptment. i think he has mitchell also

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MBRP 4" 409ss exhaust
Accufab Polished Elbow
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In dash DVD
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Kicker amp powering 12" sub
Smoked tail and parking lights
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