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I have a '95 Sonoma 2.2L 5spd, A/C, The coolant temp gauge is reading very low. I have replaced the 'stat 3 times, cleaned the sensor and still no change. The heater blows hot, so I question the accuracy of what I read on the Gauge. Can a sensor not operate correctly and give a false "cold" reading to the ECM?It does not run well except at high rpms. Frequent hesitating and bucking. Downshift and get on the gas and it is fine. Any suggestions??? BTW, the fan clutch is fine.
 

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Store bought ain't custom
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516 Posts
being that it came from GM I would assume that the gauge is pretty inaccurate. Has your gauge always read low?

I would suggest maybe checking the part number on your temp sensor, make sure its the right one. Then maybe if you can get a buddy to help you or something, check the resistance of the wires running to it, make sure its not grounded anywhere or anything like that.

Also, might want to check you ignition stuff.

I'm just throwing stuff out. I don't really know much your problem.
 

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Do I need a gas mask?!
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5,780 Posts
i have the sensor for the thermostat if you would like to try it, new in box. I have ALL of the 2.2 cooling stuff for sale too.
 
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