catalytic converter
Too little coolant, or a plugged coolant line.
i have no heat in my 1994 mercury grand marquis. what could cause the heat to stop working
Heat.
The engine is overheating.
it can cause to fire and
Sounds like the ignition module located under thecoil pack is breaking down from heat.
Did you check your thermostat. another reason could be your heater core is plugged.
The combustion process cause the engine to heat up.
Clutch slippage can cause an engine to overheat by running the engine at higher rpm's than what it is recommended for the motor. Excessive heat in the engine can cause the head gaskets to leak building up heat in the motor. There are inexpensive kits to test whether your headgasket is leaking or not.
Oil leaks will not cause an engine to heat or to seize. A lack of oil will cause it to get hot and seize which is caused by not checking the oil level and adding as necessary to keep it full. As long as the engine has the proper amount of oil it will run just fine. The leaks may cause a mess, waste of oil and money, but they will cause no damage to the engine.
get a crack in the muffler, my friend has a BMW 325i 94 and it backfires, when we checked whats the cause of it, it was because the muffler has a crack on it :p hope this helps :p, but it wont backfire unless the engine gets to a certain heat like the engine's normal heat. Ps. the car is gonna be noisy a bit btw :p
no oil in engine or water in radiator will cause engine to seriously o/heat! and eventually seize! major engine damage!!