Bad Temp sensor. ('92 4L)
#1
#2
It shouldn't, my sensor was bad, and after i replaced it my truck still had ****ty gas milage, so i don't think it would effect fuel mixture, just the trucks cooling system, but if its bad you might as well replace it, i think its only 16 dollars at advance, you trucks almost as old as mine so it could probably use one.
#3
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#9
There should be two coolant temp sensors...i may be mistaken but one for the PCM and one for the gauge. The one for the PCM lets the PCM know when the engine is at operating temp so it can switch the fuel trim into closed loop and start receiving feedback fromt he oxygen sensors....changing fuel ratio
#12
Hi guys Im new, but have a question. So what would happen if the PCM sensor was bad exactly? Say the Sender is working fine and the ECT sensor is bad. I was working on my thermostat housing (replacement actually) and pulled the wires out of the connector to the ECT sensor NOT Sender. Any help would be appreciated!!!
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