03-09-2019, 05:44 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,615
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Not Ranked
Check the wiring, especially for grounds. If that is OK go to NAPA or some parts store and buy a gauge that you can use in your hand and hook it onto your sensor and see what it does. If it reads OK then you have a gauge problem or a wiring problem at the back of the gauge. If not your sensor could be going bad. By it acting the way it does when you first turn the key on I would suspect a wiring issue.
Ron
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