Flakey EOT Sensor
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Elder User
Joined: Jul 2012
Posts: 834
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From: tonopah, az
Flakey EOT Sensor
Hi Guys,
I just got a call from the wife stating that the eot was 121 and ect was 193. She turned around and got back home and the scan guage was also going blank with key on. I had her unplug the sc2 and leave key off for a few and reconnect and temp is showing normal. I had replaced that sensor 2 years ago. Whats the expected life and normal ohms reading cold? Thanks. Will update when i look at it later.
I just got a call from the wife stating that the eot was 121 and ect was 193. She turned around and got back home and the scan guage was also going blank with key on. I had her unplug the sc2 and leave key off for a few and reconnect and temp is showing normal. I had replaced that sensor 2 years ago. Whats the expected life and normal ohms reading cold? Thanks. Will update when i look at it later.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
Sounds more like an SG2 problem than a sensor problem. Mine will do that occasionally too. The two sensors are identical and can be interchanged. A good test would be if they read similar/identical temps after a 10 or 12 hour cold soak.
Fleet Mechanic
Joined: Aug 2012
Posts: 1,760
Likes: 21
I have a similar problem, my EOT will hang around 170 to 180 and jumps around a bit while the ECT is steady 190. If I play with the wires, pinch them ect. then it's good for a few days. I think I bumped the sensor pigtail when I was removing the turbo last time. I have never had a problem with the SG2.
I found the pigtail at Rock Auto just need to get it and splice it in.
.
I found the pigtail at Rock Auto just need to get it and splice it in.
.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
I've had my SGII freeze or not show EOT on several occasions when volts and ECT were functioning just fine. The only thing that would "cure" it was to turn the truck off and let the SGII go to sleep then start and let it come on by itself. I'm not saying the sensor doesn't have a problem, I'm just saying it's not uncommon for the SGII to do that occasionally.
Lead Driver
Joined: Oct 2010
Posts: 5,420
Likes: 16
From: Ouray, CO
I've had my SGII freeze or not show EOT on several occasions when volts and ECT were functioning just fine. The only thing that would "cure" it was to turn the truck off and let the SGII go to sleep then start and let it come on by itself. I'm not saying the sensor doesn't have a problem, I'm just saying it's not uncommon for the SGII to do that occasionally.
Sent from my Sprint PC36100 using IB AutoGroup
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Elder User
Joined: Jul 2012
Posts: 834
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From: tonopah, az
swapped the sensors this am and got same ambient reading around 80. no chaffing, pigtail looks fine..thinking it had to have been the scanguage..no other explanation since the sensor and wiring are in great shape and reading correctly.
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