I'm stumped.. - Ford Powerstroke Diesel Forum
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Old 04-11-2013, 01:04 PM
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I'm stumped..

Ever since I got my ScanGauge, I've had issues with high eot's. I did a coolant flush to get the ford gold out but then I realized that everytime I go to start my truck in the morning, The eot is around 110*, which makes no sense since the outside temp is around 70*. All my other temps (ect, tft) are around outside temp.

Now the real problem is it's like the eot is always reading 40-50* higher than it should. The main issue with all this being everytime I go down the interstate for more than ten miles, the truck goes into limp mode because the eot's will hit 260*. I replaced the probe for the eot's right beside the oil filter and that didn't do a thing, but I don't know what else to do. Could the ecm be screwed up or what?
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Old 04-11-2013, 02:32 PM
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Replace the sender unit or you can swap the ect with the eot sender, they are the same part #. You will need to replace it for the long term.
Look at it this way: better than a bad oil cooler
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Old 04-11-2013, 02:46 PM
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I did replace the eot sender with a new one and it didn't make a difference...


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Old 04-11-2013, 03:03 PM
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Try pulling the battery cables to both batteries and turn on headlights and hold down brake to discharge system all the way and then power back up. Maybe the computer is in a funk ??
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Old 04-11-2013, 03:20 PM
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I unhooked both batteries for 45 minutes and that didn't help a thing. I'm not sure what the deal is?


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Old 04-11-2013, 03:24 PM
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I left the new sensor in the motor and unplugged the connector and plugged the old one in and set it onto of the motor (which hasn't been running) and it reads 125* while the air temp is 64*. Idk if the computer is having issues or what?


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Old 04-11-2013, 03:51 PM
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Check over the harness for chafing. The sender works off of resistance and if there is some grounding along the line it will cause it to do that. Also look at the pigtail for grease in it, must be clean clean.
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Old 04-11-2013, 04:05 PM
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I'll try that tomorrow since it's dark out. It's a huge pain because I can't even drive the thing without it going into limp mode because it says it's getting so hot.
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Old 04-11-2013, 04:06 PM
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Please don't be offended, but are you sure you pulled the oil temp sensor?
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Old 04-11-2013, 04:17 PM
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Quote:
Originally Posted by PHYRMN View Post
Please don't be offended, but are you sure you pulled the oil temp sensor?
Lol no offense taken i know how some stupid people are. Yes it's the correct one. I check my unplugged the connector while leaving the sender in place, and connecting the old sender to the connecter and laying it ontop of the motor and the reading went way down.

I went out and looked at the pigtail and everything looks good. No rubbing or chaffing. Idk if the ECM is having issues or what? I don't have a tuner to try and new tune other than stock to see if that helps and the only thing I can think of is a reflash from the stealer.


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