[rs70chgrrt]

Just put a new head on my fathers 97 SPI 2.0. Runs great but the temp guage is pegged(way past the red) and the tach doesn't work. I disconnected sending unit and the temp guage drops back a bit (to about 3/4 of the way up on the scale). Checked all the wires for a pinched or grounded wire and all looked ok. Just wondering if anyone else has ever had this problem. It wasn't this way prior to head install. TIA

 

[pextor]

probably have the two coolant sensors swapped, one is for the gauge and one is for the computer.

 

[rs70chgrrt]

Thanks for the quick reply but I checked them. The connectors are slightly different. The car runs great otherwise. No check engine light just the wierd guage problem.

thx

 

[pextor]

i thought they were different, so as to avoid my hypothetical situation.

must be a bad sender then.

 

[marclar]

bad ground. in 3rd gens the tack gets signal from the pcm

 

[rs70chgrrt]

Just an FYI follow up. I put a new coolant temp sensor(the one for the guage, not the PCM) and it cured all problems. Thanks to those who gave input.

 

[98ghost]

Just an FYI follow up. I put a new coolant temp sensor(the one for the guage, not the PCM) and it cured all problems. Thanks to those who gave input.

It fixed the tach problem also?

 

[rs70chgrrt]

YEP, I didn't try replacing the sensor sooner because I figured it couldn't be the cause of ALL the problems. Go figure.