Of course i was talking about the 300, if its a 5.0, i am unsure of where the temp sensor is and if it how accurate it is. I am unaware of any 94 trucks that dont have the NORMAL stock temp gauge. Very interesting.

 

Subford! Your Pics, diagrams & illustrations, never cease to amaze me!

 

Here's a related question. If the ECT is pooched, and closed loop is not occurring as a result, in addition the MPG taking a big hit, will curb idle also be evaluated 100-200 RPM as a result of the ECU not being told that norm. op. temp. has actually occurred by the ECT?

 

Yes, the correct place for temp sensor is near t-stat, first i was confused and think the ECT sensor was the same for the gauge because is in the logical place.

 

Mine always run on the N or the O.

 

Having the same issue...Changed the ECT sensor already(it was broken and barely connecting). Is this pic of the 302 V8? I can't seem to located the gauge sensor on mine..

 

Yes it was a photo of a 302 V8 in a 1988 E-150.

 

I'm going to go outside in a few minutes to see if I can locate it. It looks like its right under the distro on the drivers side.

 

Yes on the drivers side and slightly behind the distributor.

 

So i grounded the wire and it shot right over to the H... Am I correct to assume the switch is bad and needs replacing?

 

The gauge works.
You need to replace the sender.

 

which is the part in the picture?

 

Yes the Temp sender in the picture.

 

I have the 302 in my 92 and mine would only make it up to the O when driving long distances on the highway, it generally stays below the N or on it.
So I replaced it thinking it was defective and the new one did the same thing, so I assume I have a 180* thermostat.

Not sure on the 300 but mine gushed coolant when I changed mine, so you might want to drain some before taking it out.

 

ok.. i changed it and it barely moved from behind the C.. but it moved. I would think I probably need to actually be driving to see it move up.When I turned to truck off, the needle began moving past the C on the gauge...