The sender may not be grounding with too much paste on the threads. With the engine warm, hold a screw driver against the body and touch the cylinder head, Have Tracy watch the gauge for movement.
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Mitch
1970 Chevelle SS
1966 Chevelle SS
1967 Camaro ss/rs
1938 Business coupe, street rod
2000 FXSTS, original owner, 13k miles
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