Originally posted by Oren09
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But seems to do the job.
I think a lot of wasted effort has been put into the thermostat, in some cases it did help, but I believe poor heat in the cabin is a heater core issue, and the temp gage in the cluster is a poor indicator of engine temp.
If you can get low to mid 40"s MPG wise, there is nothing wrong with your thermostat.
I fixed my gage by cleaning the sensor contact, cutting off the wired connector and soldering the wire directly to the sensor.
Response, range, and sensitivity all increased.
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