A/C. Is this normal?

[Stuttgarttoo]

I've just bought my 2002 5 speed manual Boxster (986) from my partner who put 27,000 Km (16875 miles) in 5 years. He changed the evaporator because of leakage about a year ago. The A/C is working fine, lots of cold air even in the hot an humid days of the Caribbean where I live but...... when I suddenly press the accelerator pedal it kicks out the compressor for like 5 seconds and then kicks back on again, runs ok until I press fast on the pedal when kicks out again and so on. At first I thought this could be a feature for having all power when you need to accelerate fast (passing another car for example), but now I don't know. It does it even at idle: say you're stopped in a red light, you feel the compressor is on and cold air is blowing, then you rev it for a moment let it back to idle and about 5 seconds later you hear and feel the compressor kicking on again (meaning it went off while reving) and remains like this until you rev it to reassuming your drive. When I'm on a constant speed it does not turns off the compressor, thats why I have good cold air.
Is this normal? Low refrigerant charge and pressure switch taking out the compressor?
Thank you guys and girls in advance for your imputs
Rafael

[sahtt57]

I don't believe your system is functioning correctly. Specifically, your compressor should not be shutting off while idling at a light simply because you hit the gas a little. The only systems that I'm familiar with like you mentioned are ones that turn off the a/c compressor when the TPS recognizes WOT. I'd test the load on your compressor and make sure it's not being overworked, these are not cheap parts to replace. You can use this auto forum search engine for more information as odds are it's a slightly complicated issue. At least you are still getting cold air.

[tholyoak]

Read your owner's manual:

General instructions for air-conditioning compressor

-Can switch off briefly if engine is under extreme load to ensure sufficient engine cooling.

Sounds like in your climate it is working the way it is supposed to.

Todd