| [GMCnet] Water Temp gauge calibration [message #315674] |
Sat, 08 April 2017 19:39  |
kelvin
Messages: 608
Registered: February 2004
Location: Eugene, OR
Karma:
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Senior Member |
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Since installing my FiTech fuel injection I've displayed the water temp
on the handheld screen. This told me I was running 145° going down the
road with outside temps near 32°F. The VDO gauge on the dash was
registering ~180°.
I've taken this Christmas trip for over a decade now and just assumed
the GMC had a lousy heater. After covering half of my radiator with a
garbage bag I was please to find I had a pretty good heater. The FiTech
gauge was around 175-180° and the VDO gauge was now registering around
230°.
I have since installed a 195° thermostat and at 55°outside temps my
FiTech gauge says I'm running around ~185° and the VDO gauge is still at
230-ish.
Is there any way I can calibrate the VDO gauge to reflect what I think
is the correct coolant temp? Will a resistor inline change the signal
sent by that sender? A potentiometer so I can dial it in? I know just
enough about electrons to mostly stay out of trouble.
Thanks,
Kelvin
'73 23' in Eugene, OR
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