High EOT's AFTER repairs.
Thread Starter
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
Update, Update, Update...
No change...not one degree different than it was Monday prior to this latest round of parts changing...
I really want to swear...a lot...just sayin'!
I really want to swear...a lot...just sayin'!
Elder User
Joined: Oct 2001
Posts: 544
Likes: 2
From: Jersey Shore Not Seaside!
Based on the description of the front cover and no comment about the impeller being loose I wasn't expecting a change. The cover and the oil pump issues were minor.
I know you have flipped the harness to sensors but the previously stated comment about a change in temp with this flip has me concerned. Sensors can vary with both the zero point and the gain. If the gain is off they might read the same temp at 0deg, off by 2deg at 70, but off by 10deg or more at 200deg.
You've thrown a lot of time and materials at this, but if this was mine I would go back to M5C5's comment back on the first page about a secondary temp check as a sanity check (I would need one at this point). Not screwing around with a temp gun but putting in mechanical temp sensors independent of the harnesses. Last attempt before I would be pulling this motor apart.
I know you have flipped the harness to sensors but the previously stated comment about a change in temp with this flip has me concerned. Sensors can vary with both the zero point and the gain. If the gain is off they might read the same temp at 0deg, off by 2deg at 70, but off by 10deg or more at 200deg.
You've thrown a lot of time and materials at this, but if this was mine I would go back to M5C5's comment back on the first page about a secondary temp check as a sanity check (I would need one at this point). Not screwing around with a temp gun but putting in mechanical temp sensors independent of the harnesses. Last attempt before I would be pulling this motor apart.
Thread Starter
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
While my parents considered this a swear word when I was a kid, it doesn't quite cover the type of swearing I'd like to do right now...but thanks for keeping how I feel clean...
We're considering all possibilities at this point and will develop a plan over the coming days to explore them and keep me from ending up in the poor house.
Thread Starter
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
Based on the description of the front cover and no comment about the impeller being loose I wasn't expecting a change. The cover and the oil pump issues were minor.
I know you have flipped the harness to sensors but the previously stated comment about a change in temp with this flip has me concerned. Sensors can vary with both the zero point and the gain. If the gain is off they might read the same temp at 0deg, off by 2deg at 70, but off by 10deg or more at 200deg.
You've thrown a lot of time and materials at this, but if this was mine I would go back to M5C5's comment back on the first page about a secondary temp check as a sanity check (I would need one at this point). Not screwing around with a temp gun but putting in mechanical temp sensors independent of the harnesses. Last attempt before I would be pulling this motor apart.
I know you have flipped the harness to sensors but the previously stated comment about a change in temp with this flip has me concerned. Sensors can vary with both the zero point and the gain. If the gain is off they might read the same temp at 0deg, off by 2deg at 70, but off by 10deg or more at 200deg.
You've thrown a lot of time and materials at this, but if this was mine I would go back to M5C5's comment back on the first page about a secondary temp check as a sanity check (I would need one at this point). Not screwing around with a temp gun but putting in mechanical temp sensors independent of the harnesses. Last attempt before I would be pulling this motor apart.
The only other anomaly that we've discovered in the past couple of days is the "Wrench" light that illuminates when the delta between EOT and ECT is too wide. It doesn't do it consistently and only started coming on intermittently about a month ago...we're researching it now.
The temp gauge you suggest will be installed soon...I'll report back with data when I have it.
On the bright side, except for the heater core, the cooling system is new...
Last edited by 06FUN; Jul 13, 2013 at 07:08 AM. Reason: Spelling error
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
One thing that controls the flow of oil and coolant through the use of by-passes that hasn't been changed that I can see is the oil cooler housing itself, and have you tried a known good PCM? Just a swap and run and see if there are any changes.
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
Minor update...
I just returned from a 2,500 mile trip to Missouri and back that proved the truck runs perfectly. I tracked each and every mile and gallon of fuel and calculate 17.21 mpg with the cruise set at 78 mph. No loss of engine oil or coolant with ECT at 180 to 184 and EOT at 245.
We will swap the processor with a known good one this weekend to see if something changes and hopefully get a mechanical gauge installed to check the oil temp.
The latest oil analysis came back clean...we had them check for heat related damage, fuel, coolant and anything else and the test came back with all parameters well below what would raise a red flag.
I'll report back soon...stay tuned.
We will swap the processor with a known good one this weekend to see if something changes and hopefully get a mechanical gauge installed to check the oil temp.
The latest oil analysis came back clean...we had them check for heat related damage, fuel, coolant and anything else and the test came back with all parameters well below what would raise a red flag.
I'll report back soon...stay tuned.
Thread Starter
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
When we attempted to flush the cooling system earlier in this saga we couldn't get the truck up to operating temp so the thermostat was replaced with a new Ford part but the low engine temps still persist. This is another reason we're beginning to believe that there's a ghost in the machine. While it is possible the new thermostat is bad it seems unlikely based on my technicians experience.
We'll swap processors with a known good one and do some test runs and if we find nothing of note we'll pull the thermostat and replace it.
From there I'm going to...well...uh...I'm not sure...
Lead Driver
Joined: Oct 2010
Posts: 5,420
Likes: 16
From: Ouray, CO
Could we be backwards in our thinking....
We've all assumed there is no COOLANT flowing through the oil cooler...
What if there is no OIL flowing through the oil cooler due to a blockage during the install?
Just trying to offer another way 2 + 2 = 4..
good luck
We've all assumed there is no COOLANT flowing through the oil cooler...
What if there is no OIL flowing through the oil cooler due to a blockage during the install?
Just trying to offer another way 2 + 2 = 4..
good luck
Thread Starter
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
This is a reasonable question for sure...what we don't know how to do is test for oil flow thru the cooler. If we're unable to solve the problem via the electronics, I'll have to pay to have the oil cooler and related parts removed and inspected. As was suggested earlier in this adventure, we will inspect the oil passages, where possible, with a camera and look for an obstruction.
Thanks to all for the time and effort thus far...we're going to find the problem and solve this mystery and be smarter for it.
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah