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Temps in most vehicles need to be at 180 degrees and some today are running 192 to 197. Any automotive store can tell you what temp the thermostat should be and don't forget to check the temperature sending unit, they do malfunction.
Temperature sending unit? Head gasket weeping? a hose clamp that is getting old and possibly a heater hose getting hard, might replace them if you haven't already.
I have disconnected the positive side of my battery and waited a few seconds and reattached it. The fuel gauge works again, sometimes for 2-3 weeks, before I have to redo this procedure. There are no error codes when the fuel sensor fails. So, with that, I feel the ground is the culprit. Anyone know where to find it? Blackie
Coil pack may be bad or the body plate is rusted, no connection.
Have you checked at night to see if there is a trunk, interior light or glove box light on?
It does not always do this. It may go days before it does it from one time to the other. Only when it gets warm from a lot of stop and go. I had the filter and fluid changed 3 months ago and it seemed pretty good for a month, then in the second month it did it again, only for a couple of days, then back to normal. Today it did it again. Just can't figure that out.
My fuel gauge acts up when it is zero or below. It will generally read fuller than it is, but when the weather is above zero it seems to be okay. What do you think? Ground? Faulty sensor?