Coolant temp issues
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CF Beginner
Joined: Nov 2011
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The new sensor definitely had impact marks on it so I tossed it scoped out the thermostat and it looked pretty good so I installed the original temp sensor and now my truck reads 195-200 and my fuel economy is back to normal. That thing was a pain in the butt to burp man, it probably took me like 30 minutes of straight idling before that thing decided it wanted to blow all it's bubbles out. Probably because everything is brand spanking new.
CF Beginner
Joined: Oct 2011
Posts: 20
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140.
Isn't that the same temp the gage reads when the ignition is off?
what number do you get if you just disconnect the sensor?
one thing neither of us has been too clear on...
for older trucks (1996) you've got two temperature sensors.
one for the computer and one for the dashboard gage.
they have different part numbers
are you sure which one is which?
Isn't that the same temp the gage reads when the ignition is off?
what number do you get if you just disconnect the sensor?
one thing neither of us has been too clear on...
for older trucks (1996) you've got two temperature sensors.
one for the computer and one for the dashboard gage.
they have different part numbers
are you sure which one is which?
Last edited by wgf; Nov 27, 2011 at 2:05 PM.
Thread Starter
CF Beginner
Joined: Nov 2011
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When I turn my truck off it bottoms out and if I disconnect it the check engine light comes on and the gauge tops out. I am only aware of one sensor and it is located right under the thermostat. According to my wiring diagrams there is only one on my truck as well and it shares a ground with the throttle position sensor anyway the wires are good and according to a chart I got from a different site my sensor is at the right ohms at the right temps
CF Beginner
Joined: Oct 2011
Posts: 20
Likes: 1
bummer,
but its always good to get a straight answer to a straight question.
no doubt, it hard to argue that every time to juggle those two components you get a different result. so it seems reasonable thats where the problem is
one more question.
does the sensor under the thermostat have one wire or two?
if there is only one wire then it needs to be grounded thru the threads.
maybe too much thread sealant for a good ground?
(if you provide another ground to the sensor shell will that alter the gage reading?)
not to beat a dead horse but.. check along the drivers side of the block ( between cyl 1 and 2) for a similar looking sensor with 1 or 2 wires. your last answer would make more sense if you dont have one there but lemme know what you find.
back to the 140 reading...
any chance it really is 140 this time?
maybe more air sitting on top of the thermostat?
are the radiator fans running all the time?
is the thermostat stuck open this time?
but its always good to get a straight answer to a straight question.
no doubt, it hard to argue that every time to juggle those two components you get a different result. so it seems reasonable thats where the problem is
one more question.
does the sensor under the thermostat have one wire or two?
if there is only one wire then it needs to be grounded thru the threads.
maybe too much thread sealant for a good ground?
(if you provide another ground to the sensor shell will that alter the gage reading?)
not to beat a dead horse but.. check along the drivers side of the block ( between cyl 1 and 2) for a similar looking sensor with 1 or 2 wires. your last answer would make more sense if you dont have one there but lemme know what you find.
back to the 140 reading...
any chance it really is 140 this time?
maybe more air sitting on top of the thermostat?
are the radiator fans running all the time?
is the thermostat stuck open this time?
Last edited by wgf; Nov 29, 2011 at 12:55 PM.
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