Max ac pressure for 1998 sunfire

Thermostat installed correctly? in backwards? low on coolent? Clogged coolent passageways, might want to flush system and refill. Too much antifreeze/not enough water will cause this also.

Tire pressure should be within 5 psi of the tires recommended max pressure but never higher. All tires have there max pressure stamped on the sidewall of the tire. Never go by the vehicles recommendation for tire pressure, always go by the tire. Some tires have different pressure recommendations than others. 35psi is most common- but some car tires rec. 44psi or more.

The ac system should be between 30-40 psi. If your doing it yourself one small can should be enough. You can buy a kit that has the can with a hose the has a pressure gauge on it. That gauge will tell you if you have enough freon in your system. When you charge it make sure the ac is on full max before charging

Sounds like a failure in the clutch hydraulic actuator system, and it shares a reservoir with the brake system. When the clutch actuator master or slave develops a leak, the brake fluid runs out too.
This is dangerous and a mechanic needs to get on it soon. Not owner fixable, and not something simple which can be fixed by pouring some fluid in somewhere.

check the pressures of the a/c system. if there is not enough freon the compressor clutch wont engage

Low on R134a, you need to have the system recharged. Try to stay away from the do it your self kit that most Auto Parts store carry.
Below are normal car AC pressure readings with 134A

Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI

Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI

Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

Thank you for using fixya and good luck.

http://www.freeautomechanic.com/airconditioning.html

Start by removing the EGR and clean it, or replace it. (They usually get gummed up with carbon) This would be the best place to start.

can u hook up a 2200 1998 sunfire motor in a 1995 sunfire 2,2?

This problem is caused by a burnt out fan speed dropping resistor, the resistor is near the blower fan on the air box.

1. Relieve fuel system pressure.
2. Drain the fuel tank.
3. Remove the fuel tank.
4. Remove the fuel sender assembly.
5. Note the strainer (1) position for future reference.
6. Support the reservoir with one hand and grasp the strainer with the other hand.
7. Use a screwdriver to pry the strainer ferrule off the reservoir.
8. Discard the strainer.