A/c compressor kicks on at about 50psi then immediately kicks off when the gauge drops to 22psi. We are using the correct gauges.
Its supposed to do that.
If the system is full of freon, the compressor should start up above 30psi and stay running.
Have you added any freon yet ? What is the high side pressure ?
SOURCE: Troubleshooting non-functioning gas gauge on 2002 Blazer 2-door
Sure there is!
DO THIS FIRST!!!
When you turn the key on, and the gauges and warning lights come to life, does the needle on the fuel gauge move a tiny bit? It should. If it does move a hair, this is a good sign your gauge is still good. If not, keep reading.
The gauges themselves are usually not at fault, but they can fail, of course. Usually, it's the sender or float that's the culprit. The assembly resides in the fuel tank in the module or unit that houses your fuel pump. Many customers (when faced with the cost of this tank job) will opt for waiting until the fuel pump goes bad, and replacing pump and sending unit together. However, there are obvious drawbacks to this!
ONE test you could do if you are good at driveway car work is this: Crawl under vehicle and find the bundle of wires (not tubes or lines) that goes up to the top of the fuel tank. Sometimes you can reach it through the rear wheel well. Follow this small group of wires up to wherever it plugs in to the pigtail coming out of the tank. THis could be on top of tank, or just outside the perimeter of the tank. Unplug this connection. Using a common 12 volt test lamp probe, ground the test lamp, turn the key to the "ON" position so dash lights up, and touch tester to each wire tip on the end not connected to the tank (engine side of wire harness.) Have someone watch the fuel gauge as you touch the leads one by one. The gauge should move when one of these is grounded thru the lite. Total deflection of the needle means your sender is at fault, not the gauge. BUt it's usually the sender, anyway. THey're cheap enough, but the labor on a tank job can vary from place to place.
Good luck, TT
SOURCE: AC stopped working
Try disconnecting the battery for a minute or so and reconnect it. Believe it or not this has worked for me numerous times. If this doesn't work then disconnect the switch on the accumulator. The accumulator is located in the low side (big) hose near the firewall on the passenger side of truck. Using a paperclip jump the two wires (harness side) together with engine running and a/c on. If compressor kicks on when jumped either it's low on freon or the switch is bad. Hope this is helpful.
SOURCE: 2000 Saturn SL1, need to locate low pressure
The gauge only fits one port so you can't hook it up incorrectly basically. It wasn't always that way. The old days with r-12 you could make a mistake but car manufacturers finally did something about it. I know the first time it's a little scary, but after you do it,no problem. Have fun!
SOURCE: AC booster recharge hook-up
You can only attach the the recharge hose from the kit to the low side ( A/C service port) and the cap should be blue with a leter L on it. Good luck and follow the instruction and don't over charge the system. With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the R134a and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. Good luck and hope this helps.
SOURCE: I HAVE A 2001 CHEVY BLAZER MY SERVICE ENGINE SOON
The warning lights are telling you that something is malfunctioning. As long as the warning lights are "ON" you can take it to most major auto parts stores and they will scan it for free, and if the guy that scans it has any automotive knowledge, he'll be able to tell you what is wrong and how/ how much to fix it.
Once you get the codes that the computer is giving, it'll be easier to diagnose your problem, and there are lots of guys on the website who'll be more than happy to tell you how to fix it.
362 views
Usually answered in minutes!
Thank you all! On Max A/C it is not blowing cool air even. We have added freon and we have actual gauges. We pulled the low side plus and put a jumper in it and the compressor works fine. We have concluded it needs replaced :) Thank you all again!
×