I was just out doing some xmas shopping and car was fine, on the way home i noticed the temp gauge going a lil crazy. Heat was not coming on unless i was actually moving. Then when i shut the car off, it would not start again.
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If your coolant overflow is bubbling then regardless of what your gauge says you are having overheating issues. If your coolant is missing with no aparent leaks then you need to check your oil for a milky consistency and apearance which would most likely point to a blown head gasket. This would also explain overheating. Hope this helps
I notice that you replaced the water pump,Did the car over heat at any time, If it did end you didn,t stop right away when it first happen, It can do real serious damage to the engine, That will give the syptons you are describeing,If you notice that the car starts to use more oil, That is a deffenet sign there was damage done to the engine,That it done damage to the piston rings, Have you changed the thermostat in it? It tell me allso when you stay your temp gauge is not working that the termostat .Might not be functioning(Properly) End mess up the temp (Sending) unit. If the car is over heating there will be a loss in power,
Any chance of a head gasket leak? Is the coolant level still full? These were known for head gasket issues. Coolant is a closed system and level will not drop unless there is a leak. Make sure there is no air in the system. Replace the radiator cap to make sure that it is operating properly.
Sounds as if the electric fan on the radiator isn't coming on. Most radiator shops also work with A/C systems and may be more qualified to do the work. However, any good "normal" repair shop should also be able to diagnose the problem. Try not to drive it very far and keep close watch on the engine temperature. An overheat can do extensive (expensive) engine damage. If you have a fill cap on the radiator, fill it there (when cooled down) filling the recovery bottle may not be sufficient to get coolant into the engine.
Hi - sad to hear your having trouble with your Mustan.
Let me try to put you in the right direction. Sometimes the gauges become magnetized because of variations in the quality of that gauge or some other anomaly. Try this. Before you start the engine and while it is cold, pull the temperature wire loose at the sending unit on the engine. See if this drops the needle to zero degrees. If it does - you will notice that even when the car is operating temperature the needle will still read zero. If you are sure the car isn't over heating - drive the car like this for a few trips to the store or to work and home. If you're not 100% sure the car is running fine be sure to stop and check that no water is escaping from the engine water hoses. Hook the wire back up and see if that doesn't demagnetize the unit. I would save my pennies and either replace the sending unit - gauge or both.
I hope this helps you get your car back to where you want it.