The low-pressure service port is on the line that goes from the firewall to the compressor. There should be a blue or black ( not sure about green ) threaded cap on it. Just unscrew the cap and you're ready to add refrigerant.

Sounds like u may have low refrigerant in the ac system.Adding some R134a refrigerant should fix it.U can buy the refrigerant from the local parts stores or stop by at local shop the have it topped off.Should be inexpensive and quick.If u decide to do it at home...Attention do not overcharge the system.

A vacuum solenoid is basically a vacuum-operated mechanical switch. It's used to control the vents and other components on the vehicle.
Try the many on-line auto parts sources, such as; www.RockAuto.com or www.autopartswarehouse.com for the replacement parts.

Replace the blower motor resistor.
FYI....... http://www.autozone.com/.../...rGuideContent.jsp

sometimes a computer problem will cause this. try this, i know it sounds stupid, but hear me out. disconnect the negative battery wire from the battery. wait 10 minutes, hook it back up. what your doing is resetting the computer. if it stops then you have a computer problem. but it just might buy u some time to replace.

trace you power wires to your head lights. could even be a defective bulb or socket

Several possibilities; faulty light switch, faulty headlamp relay, faulty headlamp wiring or connections - common to both lights.

These are the overheating symptoms.

A low coolant level, a coolant leak (through internal or external leaks), poor heat conductivity inside the engine because of accumulated deposits in the water jackets, a defective thermostat that doesn't open, poor airflow through the radiator, a slipping fan clutch, an inoperative electric cooling fan, a collapsed lower radiator hose, an eroded or loose water pump impeller, or even a defective radiator cap.

Note: check the coolant level.
Air pockets trapped in the cooling system can cause the engine to overheat. Some cooling systems have air bleed valves built into the system to aid in the removal of air pockets. Advice: For many cooling systems, the method of removing air pockets is to start the engine and allow it to run with the radiator cap off or loose until all the air escapes from the neck of the radiator. For some systems this method is not sufficient, and the manufacturer has installed air bleed valves usually near or on the thermostat housing.

U need to check the ac system for leaks.

1. Remove the bolt from the front engine mount and swing the mount out of the way you can jack up on the rear of the engine enough to reach the spark plugs. If you still don't have enough room loosen up the nuts on the front engine mounts on the passenger side of vehicle.

FYI........... http://www.justanswer.com/.../...-spark-plugs.html

2. When a fuel filter becomes clogged, the vehicle's performance will seem sluggish and the engine may experience difficult starting and idling due to a insufficient fuel supply.

Replace the fuel filter.

It will usually make noise.

Maybe the used a low quality oil.That its the only reason i can think.The difference between the two is that the 5W30 flows better when cold, so if you live in a cold climate or operate your vehicle in a cold climate during the winter months, you should use 5W30 if it is the preferred oil for your vehicle. If you live in a sub-tropical climate and don't operate your vehicle in cold climates, then 10W30 is acceptable as long as the manufacturer specifies that it is permissible to use it.