Just got a new to me 73 XR7 conv. 351 2bbl. Temp guage was not working so I replaced sending unit. Now guage pegs hot when ignition is turned on but does,t come down as engine warms up. Did NAPA give me the wrong sending unit?
something seems amis, isnt the 1st step in troubleshooting the gauge/sensor to remove the wire from the sensor, put to ground and turn on the ignition, if gauge pegs bad sensor if nothing wire problem? 1973 C's are a completely different animal when it comes to going down to the local parts store and getting something off the shelf :smoke:
Thanks for all the info. I grounded the sensor wire and gauge pegged hot. Checked resistance and got 0 to ground. Read somewhere cold resistance should be around 270. anyway sensor unplugged - no gauge movement. Time to get another sensor. This time I'll keep receipt and box.