2001 Mitsubishi full size Montero temp gauge fluctuates between normal to above high temp. i had the thermostat, temp sending unit, replaced. cooling system checked no leaks, hoses are fine. i had to take it to a dealer service center where they hooked it up to the diagnostic computer and said the temp. is normal even though the gauge reads hot and that its a bad gauge. i replaced the temp. gauge and still have the same problem. has anybody had the same problem i'm tired of paying for parts and labor.