Two different temps!

[smokin'6]

Autometer gauge reads 165 while scanmaster reads 195. Difference between the two seems to be a consistant 30 degrees. Replaced the temp. sensor for the ECM, still no change. I would believe the Autometer to be correct, since Ive opened up the radiator, which I don't think I'd be doing if it was really 195. Car has a 160 stat. Anyone experience a difference between gauges and ECM? I can't see any real drawbacks to the ECM misread, figure at least it will turn on the fan sooner.

 

[ESP Products]

I would tend to trust the cooant temp sensor/ECM. The gauges (VDO or Autometer) out there are good, but can be off. The coolant sensor and gauge sender are in different location, but not that much of a difference should be seen. In short, try another sender and/or gauge.

Note: Your fan uses a seperate switch. Most likely it comes on at 165 degrees. How is that responding?

Hope this helps,
John @ ESP

 

[gbsean]

my vdo gauge reads about 30* higher I trust the scan master and direct scan and use the vdo as gauge to "see" if it is getting to Hot.

 

[scottyb]

Find someone like an AC guy that has one of those fancy thermometers that you point and shoot. Pay him 5 bucks to shoot the water neck , radiator, etc. I would temd to believe the scanmaster especially if you replaced the sensor and it didn't change.