NOT COMPLETELT SURE OF THE PRESSURE ITSELF, BUT THE GM DUAL AC SYSTEM IS DESIGNED TO HOLD 4 LBS OF R134 REFRIGIRANT. MANY OF THE AFTERMARKET KITS AND ADDITIVES WARN ABOUT EVER PUTTING MORE THAN 36 OZS INTO YOUR AC SYSTEM, BUT THE SUBURBAN AC TAKES A FULL 64 OZ CHARGE. YOU WANT TO GET YOUR PRESSURE TO THE POINT THAT WITH THE COMPRESSOR RUNNING, YOUR LOW SIDE HOLDS A 30 TO 40 PSI CHARGE. IF AT ANY TIME YOUR LOW SIDE LINE DROPS BELOW 25, SYSTEM SHUTDOWN WILL OCCUR.
It should be about 40 psi.
Recharging should be on low-pressure side only
17-22 Hg
To test the fuel pressure on a 1996 Suburban 1500, first locate the fuel pressure test port on the fuel rail. Use a fuel pressure gauge, attaching it securely to the port. Start the engine and observe the gauge reading; it should typically be between 58-64 psi when the engine is running. If the pressure is outside this range, it may indicate a problem with the fuel pump, filter, or pressure regulator.
You recharge it only through the low pressure side.
Fuel pressure should read no less then 9 LBS. and no more then 13 LBS. And yes it should hold the pressure with key on, engine off.
if i remember correctly when you first crank the engine the oil pressure should be around 60psi. after it warms up about 40psi.
When a gauge manifold is opened to the atmosphere, the reading should indicate a pressure of zero psi (or gauge pressure), assuming the gauge is calibrated correctly. This is because the gauge measures the pressure relative to atmospheric pressure, and when exposed to the atmosphere, there should be no differential pressure. If the reading does not indicate zero, it may suggest a malfunction or calibration issue with the gauge.
It should be about six inches from the compressor. The large line.
Electricity for recharging batteries should be generated using resources which are renewable. Renewable resources will not run out.
55-62 psi
With ignition "ON," engine "OFF" and fuel pump running, pressure should be 385-430 kPa (56-62 psi).