AC not cooling

SOURCE: A/C hot and cold air....

Technical Information: When the engine overheats (goes above 220 to 230 degrees), the ECM (Engine Contro Module) will disable the AC (won't let the compressor engage). This is a safety feature of the EMS (Engine Management System) to reduce potential damage to the engine from an overheat condition. Check your coolant level in the radiator & reseviore -- Low coolant level can produce the symptom you describe -- if low, top them off. Inspect your radiator hoses/cooling system for any signs of leakage (crusty deposits of dried coolant). Wherever you find this, that's where it's leaking. If you don't find any signs of leakage, replace the thermostat (& gasket if required (as a precaution) anyway. When the engine overheats, both cooling fans should come ON HIGH! If they aren't/don't, something's wrong and you need to find the cause. Every two to three years the cooling system should be flushed and inspected to ensure proper operation/condition and system protection. Overheating can seriously damage the engine. $$$$. An ounce of prevention is worth a pound of cure.

SOURCE: 2000 hyundai accent hesitates when

inlet manifold either loose or gasket blown

SOURCE: Slow pick-up, high rpm

Do a full Service air filter oil transmission oil brake fluid radiator the 9 yards this should help some if not then you should take it to a mechanic to have your transmission tested or you can use lucas transmission stop slip

SOURCE: 2000 Hyundai Elantra, Heater Problem.

check the fuses

SOURCE: 2002 Hyundai Elantra 100k miles - 2.0l - running rough

When I had this same problem...it was the Catalytic Converter...cost about 200 to get it fixed at the Hyundai Dearlership :)