ok, heres the story. i put the b18 into my 91 hb. at first, everything was good. then it starting running alot cooler than normal. so i went to my local napa and bought a oem thermostat that was just a little bit hotter. i installed that last week. but ever since then, the temp gauge on cluster doesnt work. im worried cause its my daily driver and i dont want to be driving it while its over heating. thaks for the help.

 

bump.....

 

theres a little one wire sensor under the distributor. im betting its unplugged.

 

do you know what color? what does it do?

 

hey----thanks alot sacicons. the sensor was hooked up, but the wire had broken down line. fixed it last night. thanks alot.