A/C lines - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 17 (permalink) Old 05-04-2009, 08:56 PM Thread Starter
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A/C lines

I cant seem to find the suction point for the A/C system. anyone know were its at thanks.
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post #2 of 17 (permalink) Old 05-04-2009, 09:23 PM Thread Starter
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never mind found it, now to meet the engineer that put it there in a back ally at night
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post #3 of 17 (permalink) Old 07-15-2009, 12:01 AM
 
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never mind found it, now to meet the engineer that put it there in a back ally at night
Where was it at?
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post #4 of 17 (permalink) Old 07-15-2009, 03:13 AM Thread Starter
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Its behind the air box you have to remove it to get to it. Its actually not to bad to do once you do it.
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post #5 of 17 (permalink) Old 07-15-2009, 05:38 AM
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What was the problem?

Colton

2008 F-250 PSD 4X4 XLT
Spartan-MBRP-Elite-AFE-KEM

542hp 1060trq 9/18/10
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post #6 of 17 (permalink) Old 07-15-2009, 06:09 AM
 
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I thought it was that one. but once i connect the hose it jumps up to 70psi with the motor on and a/c full blast.


My problem is that it does not blow cold air anymore.
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post #7 of 17 (permalink) Old 07-15-2009, 11:05 AM
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70psi is high. R134A replaced R22 and runs at a evaporator psi of 30 to 35 at a idle. A higher psi and warm air coming out may be a sign of a A/C compressor going bad.
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post #8 of 17 (permalink) Old 07-15-2009, 07:27 PM
 
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how do i check to see if it's going bad or not?
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post #9 of 17 (permalink) Old 07-15-2009, 08:44 PM
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70PSI, is bad news. go ahead and turn the blower down to low and put it in recirc/max mode and see if you can get the low side any lower. it would be much easier to offer advise if you can tell us what the high side/discharge pressure is. i would bet you high side is low too. the only thing you can do if it is, is to maybe inspect the orifice tube but more than likely the compressor is weak.

low side normals are usually between 25-35PSI.
high side normals are usually between 150-300PSI.
these pressures will vary depending on ambient temp, blower speed and which a/c selection you are using.
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post #10 of 17 (permalink) Old 07-15-2009, 09:11 PM
 
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i just put some on my brothers honda and it went in like nothing. i am just going to take it to the dealer and see what they say. Thanks for the help guys.

ill let you guys know what was wrong.
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