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From: Hank Dozier
Email: [email protected]
Date: March 19, 2002
Try this to see if your thermostat is stuck partially open. Start the engine cold, and remove the cap. Set the engine on fast idle cam and look to see if you have water circulating in the top tank while cold. If so, then replace your thermostat. You can also get a cheap temperature display unit from Radio Shack and stick it in the lower radiator hose going to the water pump, or the bypass hose from the intake to the water pump, and drive the vehicle and observe the actual temperature to see if there is an actual gauge/sendor fault. The other thing is that the sendor unit grounds to the manifold, so sometimes escessive teflon tape if used can corrupt the ground, causing high resistance (which reads cold).
