Quote:
Originally Posted by SpeedracerIndy
My girlfriend's 2002 Honda Passport (really an Isuzu Rodeo) is not blowing cold air anymore. It will get cool when moving, but as soon as you stop a light, it is no longer cool. I first thought a slight leak since it has almost 100,000 miles. I have a low pressure gauge, so I bought a can of R-134a to fill it up. When I hooked up the gauge with the engine running and the AC on max, the pressure was showing too high. It reads between 55-65 psi. If my chart is right, it should be in the 30-40psi range. Now I'm thinking that the compressor is bad. I am planning on getting a high pressure gauge to test the high pressure side.
What should I be looking for to tell me that the compressor is bad?
Is replacing the compressor a DIY job? What tools would I need? I assume a set of gauges, vacuum pump (can you rent these?), R134a and oil.
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Are those pressures at idle or higher rpms? You won't see 35 psi unless you have more rpms. You need high side pressures to know the story.
You could DIY the compressor, but you definitely need a vacuum pump to pull a vacuum on the system. The proper DIY way is have a shop evacuate your charge. Then, you can replace the compressor. Last, pull a vacuum to remove air and water and ensure no leaks. Then, you are ready to charge the system.
You'll also want to change the drier/accumulator.