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Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,860
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m3 ac compressor problems
I had to replace the air conditioning compressor on my ladys 97 m3 last season, The problem I am having is that the air works fine at idle, however , above 2000 rpm the compressor cuts out and no longer works, after I come to a stop, if i shut off the ac button , and turn it on again, walla!! cold ac again. I was wondering if anyone has seen this before. Could the ac panel cause a problem like this???
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No left turn un stoned |
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07-07-2007, 05:46 PM
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Registered
Join Date: Oct 2005
Location: Florida
Posts: 668
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What are your refrigerant pressures at 2000 rpm?
When your motor is turning more RPM, it is creating increased refrigerant velocities, thus lower suction pressures. If your System is low on refrigerant it would cycle off on the low pressure cut out switch when you rev the engine. The only thing that puzzles me is the fact that you have to reset it manualy. The ones I am familiar with have automatic reset pressure controls,In other words when you are at idle the system pressures return to normal operating pressures and it will start cooling on its own. But All the same, put a pressure gauge on the low side and rev the engine to see if it drops below the low pressure setting printed on the side of the green control mounted on the receiver dryer. If so, you may only need to add a little refrigerant.
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74 911 targa blk on blk, Carrera fend., tires & whls. gone, missed 85 325e bought new, totaled after 20 years & 465K miles, trouble free service. 01 Ford Ranger 4dr stpsd 4wd. I drive,here 88 325i convert. only 98k miles,gone, sold 93 325i.here, 98 Z-3 roadster. gone, 08 128 cabro gone Last edited by coolbear1; 07-07-2007 at 08:24 PM.. |
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07-07-2007, 08:11 PM
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