I am driving myself crazy!!! ECT VS EOT...again
#1
08-28-2014, 03:04 PM
I am driving myself crazy!!! ECT VS EOT...again
Cold soak over night-my EOT VS ECT is 5* different
On my 15 mile commute to work all highway my ECT temp is 190* and that stays there my EOT temp will go to 195-198 depending how heavy I am on the throttle-All flat ground 65-70MPH
Am I driving myself nuts over here?
Could my oil temp sensor bad-which would make my cold soak temps have a 5* spread right from the start?
On my 15 mile commute to work all highway my ECT temp is 190* and that stays there my EOT temp will go to 195-198 depending how heavy I am on the throttle-All flat ground 65-70MPH
Am I driving myself nuts over here?
Could my oil temp sensor bad-which would make my cold soak temps have a 5* spread right from the start?
#2
08-28-2014, 03:37 PM
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#4
08-28-2014, 04:21 PM
#6
08-28-2014, 06:54 PM
Just swapped mine to check for sensor discrepancy after cold soak. Not too bad but I broke a sensor on reinstall. I would advise hand tighten only, 13/16th deep socket should fit.
Oreillys had the replacement sensor, bwd brand for $27. Original part is manufactured by Siemens and it was ~$50 online.
Oreillys had the replacement sensor, bwd brand for $27. Original part is manufactured by Siemens and it was ~$50 online.
#7
08-28-2014, 07:04 PM
Cold soak over night-my EOT VS ECT is 5* different
On my 15 mile commute to work all highway my ECT temp is 190* and that stays there my EOT temp will go to 195-198 depending how heavy I am on the throttle-All flat ground 65-70MPH
Am I driving myself nuts over here?
Could my oil temp sensor bad-which would make my cold soak temps have a 5* spread right from the start?
On my 15 mile commute to work all highway my ECT temp is 190* and that stays there my EOT temp will go to 195-198 depending how heavy I am on the throttle-All flat ground 65-70MPH
Am I driving myself nuts over here?
Could my oil temp sensor bad-which would make my cold soak temps have a 5* spread right from the start?
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#8
08-28-2014, 10:10 PM
Yeah, I guess I am over thinking things.
I am headed up to VT tomorrow which is a 4HR drive towing ATVs for 5 different people so I would hate to ruin everyone's weekend by not making it there. I guess I'm hella paranoid from my old truck. Knock on wood this truck has been 100x better.
I won't have service until Monday night so I'll keep you guys posted after I get back and let you know how it goes.
I took the tune out of the truck and put in the 50hp tow tune.
I am headed up to VT tomorrow which is a 4HR drive towing ATVs for 5 different people so I would hate to ruin everyone's weekend by not making it there. I guess I'm hella paranoid from my old truck. Knock on wood this truck has been 100x better.
I won't have service until Monday night so I'll keep you guys posted after I get back and let you know how it goes.
I took the tune out of the truck and put in the 50hp tow tune.
#9
08-28-2014, 11:35 PM
#10
08-29-2014, 09:49 PM
which was 5* hotter??
... they do vary during the day/night I suspect the ECT sensor is in contact with the coolant so the heat would migrate UP - to the ECT, but I suspect the oil drains back to the pan and potentially leaves the EOT sensor measuring the air, housing temp, or oil trapped touching the sensor, while the oil in the pan gets hotter from the heat coming off the pavement - if in the sun in the early am.
Compare them to your trans temp, depending upon your outdoor temp and how long it actually sat, and what time of day you go back out - 5* could be just fine. I had a couple days last week where at 6PM after sitting in the office parking lot, by ECT/EOT where both 109, TFT was 105. It was 102 on the EXT TEMP sensor on my EATC display. It was HOT here last week.
Even sitting all weekend long, the individual sensors will vary as the day warms up or the night cools off.
IF you really really really want to know... take BOTH sensors out. Sit them in the sun and measure the resistance of each with a digital volt meter over the course of a few minutes/hours. With them both getting the same amount of sun you should expect their resistance values to be very close together as they heat up from the sun..
#11
09-01-2014, 06:43 PM
Alright, just updating as I got back from my trip a little while ago.
Everything went perfectly and I was very impressed with how well the truck pulled everything up there.
Going up I mainly saw coolant temps at 190 and oil temp was 210 on average.
Coming home driving a little faster and it was much warmer out-I saw my oil temp rise to 234* and my ect went to 210* fan never came on as my ECT never got that high.
Unhooked the trailer and unloaded everything temps went right down to the normal 190ECT-EOT 198-200*
So, I guess I have nothing to worry about, the truck proved itself to me with this trip. I was a little worried with the bad juju with my old 6.0 and this truck having almost 260k miles on it, everything seems to be A-OK!
Thanks guys
Everything went perfectly and I was very impressed with how well the truck pulled everything up there.
Going up I mainly saw coolant temps at 190 and oil temp was 210 on average.
Coming home driving a little faster and it was much warmer out-I saw my oil temp rise to 234* and my ect went to 210* fan never came on as my ECT never got that high.
Unhooked the trailer and unloaded everything temps went right down to the normal 190ECT-EOT 198-200*
So, I guess I have nothing to worry about, the truck proved itself to me with this trip. I was a little worried with the bad juju with my old 6.0 and this truck having almost 260k miles on it, everything seems to be A-OK!
Thanks guys
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