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Hi there,
I am thinking of recharging my AC with RED TEK but I am kind of confuse, which one is the AC low pressure port on Honda Civic 2001 DX, the blue cap or black cap??Also what should the PSI reading be with AC ON and AC OFF?
Thanks
Tony

 
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you charge it through the blue cap down by the exhaust mainfold. and to get a reading have the ac on.

 
Rep Power: 812

it says L and H on the caps. and usually those recharge kits wont work on our cars. if it has the wrong oil, you could seize the compressor. if you have to recharge the system, that means you have a leak and need to get that fixed before doing anything else.

 
Rep Power: 254

Pretty much what gearbox said, Just pay the $200 or so to get it done right otherwise your just wasting your money.