|Originally posted by Dodgerunner:|
Think you answered you own question. If both the engine and gauge are acting the same then have to guess BOTH senders are working correct.
If it takes that long to warm up you gas mileage can't be to good either.
Yes a bad stat can do that. They can float open and not let the engine warm up fast enough. If you test it in a pan I bet it will test good, but if you replace it bet your problem will be resolved. Had it happen twice on mine.
Yeah it did turn out to be the thermostat, everythings working fine now. Thanks for the reply