Engine Size: 2.0
new to the forums. I just finished installing a new ac evaporator core a few days ago, everything went well, no leaks and ice cold air. The only problem I am having with the ac is when I accelerate the compressor kicks off for a few seconds. I only added one 12oz can of r134 to check for leaks before adding the rest, so I know it is not overcharged. When I hook the gauge up to my low side port and and increase the rpm over 1,500 the pressure shoots up high then the compressor cycles off for a few seconds. What is causing this problem?
No disrespect intended, but right now you are causing the problem; its undercharged.
You will need to vacuum and charge with full amount. Then provide the low and high side pressures.
In the past when my system was undercharged the compressor would just cycle rapidly and the pressure would stay low. Now, when I accelerate the pressure increases alot then the compressor cycles. I believe the high pressure switch is turning it off. If the system is undercharged why is the pressure spiking so high when u accelerate? At idle the compressor stays on and delivers cold air.
I did not vacuum the system, but should have. I will probably replace the Accumulator, flush the liquid line/orifice tube and vacuum the system.
Edited: Thu May 28, 2015 at 8:47 PM by PITT412
You have air in the system causing the pressure spikes-that's what air does- always pull a vacuum!!!
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
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