temp sending unit - Team Camaro Tech
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post #1 of 4 (permalink) Old Apr 25th, 03, 01:55 PM Thread Starter
 
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1969 350cu.in Camaro with consel gauges. What is the normal resistance reading for the temp sending unit in relation to gauge indication. Gauge says hot(full scale) and eng. is running at about 185-190 degrees. New ZZ430 eng, new 3 row brass radiator, new everything. Hand on upper hose says 'normal' infra-red thermometer says same. Hence the question about the correlation of gauge reading/indication vs. sending unit resistance.The gauges and sender are new (Classic industries)Remove wire at sender gauge drops to left. Groung same wire gauge to full right. Any suggestions?? Thanks Pat
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post #2 of 4 (permalink) Old Apr 26th, 03, 08:23 AM
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Pat,
Welcome to Team Camaro!

The only thing I can think of off the top of my head is maybe the sender is bad.

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post #3 of 4 (permalink) Old Apr 26th, 03, 01:29 PM
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I don't know about stock. My sunpro sender reads about 1500 ohms cold and 135 ohms hot. Yours should be close. Seems like everyone has their own standard, so an aftermarket sensor likely won't work with a factory guage and visa versa.

The temperature coeficient is inverse - hotter makes lower resistance. Full scale readings is a sign of short circuit, a bad, or mismatched sensor.

-dnult

Dave
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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #4 of 4 (permalink) Old Apr 28th, 03, 04:33 PM Thread Starter
 
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Will try another sender.
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