Hey Melissa==It can be a bunch of things from a leaking radiator to blown head gaskets. Take it to a reptuable garage and have it checked out. GoodluckJoe Do you see antifreeze underneath the vehicle? After letting the engine warm up, open the hood and look for any visible signs of antifreeze leaking anywhere. Have someone check to make sure the drain valve is closed if you are unsure of where it is located. Check the dipstick, if you have a blown head gasket you may see signs of water mixed with the oil - this will look like small bubbles mixed in with the oil. Also, the vehicle may give off white "smoke" while running. Its also possible there could be a crack in the radiator, which happened to my Altima. It had developed a crack on the top of the radiator near a mounting location. The 97 had an aluminum radiator, most places you take it to will try and sell you a whole new radiator. If in fact you do find a crack, call around to some of the local repair places (for example NOT a Pepboys or similar location). Some of the smaller businesses still do repairs on radiators. A crack could be silver soldered depending on the severity.
cracked hoses
Numerous things could cause the Nissan Altima to stall. One such thing is the idle control valve, also the exhaust system could cause the engine to stall.
A 2000 Nissan Altima is an interference engine which has very tight tolerance. A slight misalignment can cause the pistons and valves to slam into each other.
Check the ignition coil, or the fuel pump.
Your throttle cable, needs to be adjusted.
my air is cold, and car does not overheat but the fan does not work
Check the transmission fluid on the 1995 Nissan Altima. Bad fluid can cause the transmission to shift harder on parts that are more worn.
A 1998 Nissan Altima uses 134a refrigerant. When charging the A/C system the correct pressure should always be used. An undercharged system will not cool properly and an overcharged system can cause the lines to fail.
you could be low on coolant
There are several things that can cause your Ford Fiesta 1.4 liter engine to lose coolant. The most common cause is a defective water hose.
alternator or bad wires
A bad crankshaft in a 96 Altima could cause the engine not to start. Depending on the crank damage, the engine could start but not run properly.