I am trying to recharge my Accord 2000 AC. I can easily find the low side pressure port, the blue color cap with 'L'. But I can not find the high pressure port. If I use gauge manifold set, where to kook up the high side? Thanks.

-jc

 

You should really only be charging on the low side. You should be using the high side just to take readings. You will fill the low side with refrigerant. I'm not certain on your car, but on mine it's close to the driver side headlight area.

 

Haha, if it was a snake, you would be bit.

Stand in front of the car and look down, it's right there behind the grille.

 

Yeah, I found it. This image (http://www.justanswer.com/uploads/lo...c_location.png) helps. It has a black cap with 'H'. Now the question is what are the readings that will tell me the refrigerant is low and how much I should charge to? Are these number universal so I can refer the DIYs I can find on the web for other cars?

 

No such thing. Freon is measured in weight, not psi. Pressures alone will not tell you if it is properly charged since many different factors affect the pressures. That being said, normal pressure range is: low side 20-40/high side 200-300. The correct refrigerant capacity is listed on the AC decal stuck to either the radiator support or the RH shock tower. It's a small rectangular silver decal.

 

Thanks DELuth. Say if there is a small slow leakage, the refrigerant is not totally gone (or the system is not empty and I don't want to empty it), how much do I need to charge into the system?

 

You can add refrigerant until the pressures get into range and it starts cooling for a driveway band-aid. Just don't let the high side get too high. The only way to properly charge the system it is to draw a vacuum and charge by weight.