Scangauge EOT question
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Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
Scangauge EOT question
I got a ScanGauge II yesterday and set it up to monitor oil, coolant, and trans fluid temps. I discovered I must need a new thermostat because my ECT (or *FWT as it is displayed) never gets over about 185 running empty in 65 F air temps.
Anyway, my question is in regard to the EOT readings I'm getting. This morning before the sun came up, I checked the three temps before running the truck and discovered that the EOT was reading about 4 degrees higher than TFT and ECT. The latter two were both the same (60 F). The truck had been sitting for more than 12 hours. I am using the following Xgauge settings for EOT:
TXD: 07E0221310
RXF: 046205130610
RXD: 3010
MTH: 000901F4FFD8
NAM: EOT
I first tried programming EOT using the settings in the Xgauge PDF on the ScanGauge site, but the thing was reading WAY too high. Then I found where guys with 2004 trucks were using the above settings with success (mine is an April '04 build).
Do I need to tweak the MTH setting to make the cold EOT read the same as the ECT and TFT? If so, how do I do this? I looked at the Xgauge Coding guide and got a headache. Any help appreciated. Thanks!
Anyway, my question is in regard to the EOT readings I'm getting. This morning before the sun came up, I checked the three temps before running the truck and discovered that the EOT was reading about 4 degrees higher than TFT and ECT. The latter two were both the same (60 F). The truck had been sitting for more than 12 hours. I am using the following Xgauge settings for EOT:
TXD: 07E0221310
RXF: 046205130610
RXD: 3010
MTH: 000901F4FFD8
NAM: EOT
I first tried programming EOT using the settings in the Xgauge PDF on the ScanGauge site, but the thing was reading WAY too high. Then I found where guys with 2004 trucks were using the above settings with success (mine is an April '04 build).
Do I need to tweak the MTH setting to make the cold EOT read the same as the ECT and TFT? If so, how do I do this? I looked at the Xgauge Coding guide and got a headache. Any help appreciated. Thanks!
Thread Starter
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Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
Amgpro2, yes I have firmware 3.17mB. I just bought my ScanGauge on Amazon.com, so I assume it's the latest version(?).
At first I wondered if the ECT was reading low, but after I saw it was exactly the same as the TFT temperature this morning, I assumed it must be reading right and my T-stat must need replacing. The EOT, however, was reading 4 degrees higher than both ECT and TFT. This afternoon, however, when the air temps rose to about 75 F and the sun had been out for a while, the EOT was only 2 degrees higher than ECT (engine still cold from not having been started yet).
I guess the variance could be the two sensors just fluctuating within ± a couple degrees of their designed specs...I dunno.
At first I wondered if the ECT was reading low, but after I saw it was exactly the same as the TFT temperature this morning, I assumed it must be reading right and my T-stat must need replacing. The EOT, however, was reading 4 degrees higher than both ECT and TFT. This afternoon, however, when the air temps rose to about 75 F and the sun had been out for a while, the EOT was only 2 degrees higher than ECT (engine still cold from not having been started yet).
I guess the variance could be the two sensors just fluctuating within ± a couple degrees of their designed specs...I dunno.
Posting Guru
Joined: May 2003
Posts: 1,990
Likes: 1
From: Middleburg, FL
I have the Insight and have noticed a 2 to 4 degree difference between ECT/EOT prior to starting the engine for the first time of the day just like you. It's been that way since the first time I installed the monitor. I've just chaulked it up to varience between the sensors.
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Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
Thanks Frank. I suspect you are right about the sensor variances. I guess I'll just put in a new T-stat and then watch to see how things look over time.
And thanks to all you ScanGauge users who posted their experiences on the site. I learned a lot from reading them!
And thanks to all you ScanGauge users who posted their experiences on the site. I learned a lot from reading them!
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