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2001 Durango V8 A/C cuts out above 1200RPM
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comnavguy
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Feb 22, 2011, 2:20 PM
Post #1 of 11
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2001 Durango V8 A/C cuts out above 1200RPM
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2001 Dodge Durango V8 with all wheel drive. Front and rear A/C and heater.
High and low pressure at static is 50 PSI. At normal idle the high pressure is 105 to 115 PSI and the low side drops to about 12 PSI. Increasing the RPM just sllightly and the compressor shuts down, and the high and low sides go back to about 50 PSI.
There is no noise whether the clutch is engaged or not.
Don't know where to start with this one.
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 22, 2011, 3:11 PM
Post #2 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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Sounds like it doesn't have enough refrigerant but a blockage in the system would give the same symptoms. That's why you should always recover all the refrigerant and recharge with the correct amount and then see what your pressures are.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 22, 2011, 7:55 PM
Post #3 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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Ditto:
Hey comnavguy not all of us get notices of a reply made. Site needs some work and bear with us,
Tom
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comnavguy
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Feb 23, 2011, 1:53 PM
Post #4 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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I thought low freon and/or lots of water or trash in the line. But to cut-out at 115 or so pounds???
How about a defective expansion valve? Would that cause this kind of failure?n
Thanks for the info. I will evacuate the system, maybe blow out a line or two and recharge the system.
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comnavguy
User
Feb 23, 2011, 1:57 PM
Post #5 of 11
(2635 views)
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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I used to get notices of replies, but not now. So, I just logon occasionally to see if there is anything.
Did you send a reply that I missed?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 23, 2011, 2:09 PM
Post #6 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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It's a college course to even start with this stuff. Pressures are all whacked as you know. Locked post near top of this section is informative. Leaks are #1 at causing problems. Debris means it's trouble big time. Debris doesn't come from an X valve but rather a failed compressor usually. 134a was OE charge and you need to know it's exact. PAG oils used absorb moisture and become acidic and there goes the whole shooting match.
Takes time but that acid will plain ruin a system - about every part of it. For any reason low charge will starve compressor of much needed oil and then the disaster happens.
Keep in mind that engine heat will raise pressure and it will try to work but self destruct. Safeguards are imperfect to shut system down.
If you go for this go new parts not remans. Trust me. No shortage of expense in this stuff either,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 23, 2011, 2:20 PM
Post #7 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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You can't have any idea what the problem and the pressure readings mean nothing is until you evacuate and recharge the system with a known quantity of refrigerant.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 23, 2011, 2:37 PM
Post #8 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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Right on the $$. Pressures give clues but until you know exact weight of charge is in it you don't know. No contamination allowed. Pure stuff only,
Tom
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comnavguy
User
Feb 23, 2011, 2:50 PM
Post #9 of 11
(2621 views)
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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I want to check the high pressure switch, but I'm not sure where the one is on this vehicle. There is a switch in the high line just before the high service port just by the radiator. Do you know if that is the only high pressure cut-off switch...and how to check it?
I assume it would be closed in normal operation up to 450 PSI and open under higher pressure? Is that correct? I have not checked the continuity yet, but that's next before I recharge the system.
As for remans, an A/C guy in south Texas told me he just LOVES reman compressors. He says he buys 12 and gets to re-do 10. He will NOT put a reman in a car anymore.
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 23, 2011, 3:26 PM
Post #10 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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Apparently you're choosing to ignore our advice so I'll back out of this now. This truck doesn't even have a high pressure switch.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 23, 2011, 10:37 PM
Post #11 of 11
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Re: 2001 Durango V8 A/C cuts out above 1200RPM
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This wreaks of dumb. Want help? listen to what is said,
T
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