Join Date: Mar 2002
Location: Austin, TX, USA
Make sure the sender is a match for your guage. The sender and guage are calibrated to work together. Is this a factory reproduction guage set? If so, the factory sender should work.
Temperature senders come in different resistances. Also, some of them increase resistance with temperature (positive temperature coefficient) and others decrease resistance with temperature (negative temperature coefficient). Most that I've seen are NTC types, but not all are created equal.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI