Fake overheating 2000 V10
Thread Starter
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5th Wheeling
Joined: Jun 2014
Posts: 33
Likes: 2
Well, EXv10,
I couldn't take the suspense any longer, and rushed to the store to get a thermostat + o-ring (not really, it just turned out to be a little cooler today than usual... ;o)
I changed the thermostat, backfilled the coolant, put the old ECT back in, and took it for a 15 mile spin.
The temp gauge worked again as it should. About 10 miles into it at 70mph the temp gauge started to go up above normal, and a minute later it pegged again. No limp mode though. I stopped the engine, waited 5 seconds, started it back up, and the temp gauge indicated everything was just peachy. I drove home at around 45 mph and the temperature gauge stayed at normal.
The heat did blow hotter than usual though.
I couldn't take the suspense any longer, and rushed to the store to get a thermostat + o-ring (not really, it just turned out to be a little cooler today than usual... ;o)
I changed the thermostat, backfilled the coolant, put the old ECT back in, and took it for a 15 mile spin.
The temp gauge worked again as it should. About 10 miles into it at 70mph the temp gauge started to go up above normal, and a minute later it pegged again. No limp mode though. I stopped the engine, waited 5 seconds, started it back up, and the temp gauge indicated everything was just peachy. I drove home at around 45 mph and the temperature gauge stayed at normal.
The heat did blow hotter than usual though.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Well, EXv10,
I couldn't take the suspense any longer, and rushed to the store to get a thermostat + o-ring (not really, it just turned out to be a little cooler today than usual... ;o)
I changed the thermostat, backfilled the coolant, put the old ECT back in, and took it for a 15 mile spin.
The temp gauge worked again as it should. About 10 miles into it at 70mph the temp gauge started to go up above normal, and a minute later it pegged again. No limp mode though. I stopped the engine, waited 5 seconds, started it back up, and the temp gauge indicated everything was just peachy. I drove home at around 45 mph and the temperature gauge stayed at normal.
The heat did blow hotter than usual though.
I couldn't take the suspense any longer, and rushed to the store to get a thermostat + o-ring (not really, it just turned out to be a little cooler today than usual... ;o)
I changed the thermostat, backfilled the coolant, put the old ECT back in, and took it for a 15 mile spin.
The temp gauge worked again as it should. About 10 miles into it at 70mph the temp gauge started to go up above normal, and a minute later it pegged again. No limp mode though. I stopped the engine, waited 5 seconds, started it back up, and the temp gauge indicated everything was just peachy. I drove home at around 45 mph and the temperature gauge stayed at normal.
The heat did blow hotter than usual though.
Thread Starter
|
5th Wheeling
Joined: Jun 2014
Posts: 33
Likes: 2
No limp mode, but it didn't go into limp mode before either, only occasionally. Motorcraft thermostat, o-ring on top of it. I did not replace the cap. When I opened the cap after it had cooled off it still gave a short hiss so it doesn't seem to leak.
So it appears that the ECT drives the gauge, and the CHT drives the coolant light and pegs the gauge when hot. Since both happen, it does seem both the SCT and CHT are working properly, and the temperature is actually elevated. So at this moment I am not sure what to do next.
I'll give it some thought and am open to suggestions.
So it appears that the ECT drives the gauge, and the CHT drives the coolant light and pegs the gauge when hot. Since both happen, it does seem both the SCT and CHT are working properly, and the temperature is actually elevated. So at this moment I am not sure what to do next.
I'll give it some thought and am open to suggestions.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
No limp mode, but it didn't go into limp mode before either, only occasionally. Motorcraft thermostat, o-ring on top of it. I did not replace the cap. When I opened the cap after it had cooled off it still gave a short hiss so it doesn't seem to leak.
So it appears that the ECT drives the gauge, and the CHT drives the coolant light and pegs the gauge when hot. Since both happen, it does seem both the SCT and CHT are working properly, and the temperature is actually elevated. So at this moment I am not sure what to do next.
I'll give it some thought and am open to suggestions.
So it appears that the ECT drives the gauge, and the CHT drives the coolant light and pegs the gauge when hot. Since both happen, it does seem both the SCT and CHT are working properly, and the temperature is actually elevated. So at this moment I am not sure what to do next.
I'll give it some thought and am open to suggestions.
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
So it appears that the ECT drives the gauge, and the CHT drives the coolant light and pegs the gauge when hot. Since both happen, it does seem both the SCT and CHT are working properly, and the temperature is actually elevated. So at this moment I am not sure what to do next.
I'll give it some thought and am open to suggestions.
I'll give it some thought and am open to suggestions.
But if only one of them was showing an overheat while the other looked completely normal, which I think is HIGHLY likely in your situation, I would look to see which sensor was spiking and test it. Thus far you haven't done a thing with the CHT sensor, and you have absolutely no idea what it's telling the PCM.
Being able to read this data can cost just a couple dollars over what you paid last night for your thermostat. STOP throwing good money after bad and see what the PCM is seeing. Do you have a smartphone of some flavor? That's the cheapest way.
Thread Starter
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5th Wheeling
Joined: Jun 2014
Posts: 33
Likes: 2
Brent,
I will be using the truck a little today, so after it has cooled off I will look for the hiss.
Tom, iPhone here, how will that read the PCM data? Is there an adapter available?
Thank you.
I will be using the truck a little today, so after it has cooled off I will look for the hiss.
Tom, iPhone here, how will that read the PCM data? Is there an adapter available?
Thank you.
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Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Originally Posted by Berriemaas
Tom, iPhone here, how will that read the PCM data? Is there an adapter available?
Thank you.
Thank you.
And you'll need an app like this:
https://itunes.apple.com/us/app/engi...591557194?mt=8
I love technology. SO much cheaper than any of the professional tools that were required before this kind of thing was common.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
After reading Brent's comment I went out and shot a little video, but thought better of posting it. When the system cools completely down there is no hiss; it's a red herring. Perhaps in Brent's heyday that was common, but it isn't today. I'm trying not to get into another argument over it though, as I think we've crapped all over your thread enough.
Yes there is. Unfortunately it's not as seamless of a process as it would be with an Android phone because the iPhone can't communicate that way via Bluetooth. But here you go:
Robot Check
And you'll need an app like this:
https://itunes.apple.com/us/app/engi...591557194?mt=8
I love technology. SO much cheaper than any of the professional tools that were required before this kind of thing was common.
Yes there is. Unfortunately it's not as seamless of a process as it would be with an Android phone because the iPhone can't communicate that way via Bluetooth. But here you go:
Robot Check
And you'll need an app like this:
https://itunes.apple.com/us/app/engi...591557194?mt=8
I love technology. SO much cheaper than any of the professional tools that were required before this kind of thing was common.
OP: What gets hotter now?
Lead Driver
Joined: Jul 2013
Posts: 9,263
Likes: 149
From: In the field...
Thread Starter
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5th Wheeling
Joined: Jun 2014
Posts: 33
Likes: 2
OK Tom,
I ordered the Engine Linc unit, says it has 17 days shipping. Hopefully it will come sooner.
I drove yesterday pulling a boat to and from the lake (~3500 lbs). Staying below 50mph (much to the displeasure of the cars behind me) it didn't overheat. Once the temp started to go up, so I turned off the air, opened the windows, and set the heat to max, and the temperature came back down again.
I ordered the Engine Linc unit, says it has 17 days shipping. Hopefully it will come sooner.
I drove yesterday pulling a boat to and from the lake (~3500 lbs). Staying below 50mph (much to the displeasure of the cars behind me) it didn't overheat. Once the temp started to go up, so I turned off the air, opened the windows, and set the heat to max, and the temperature came back down again.