2005 F250 with wrench light, need help on diagnosis - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 11-20-2012, 12:25 PM Thread Starter
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2005 F250 with wrench light, need help on diagnosis

I have been reading the forum posts trying to figure out what to do, but I can't seem to find out what to do?

I live in Southeast Alaska and put on my truck camper, in the winter and travel South for several months.

The truck is a 2005 F250 King Ranch Club Cab, 95,000 miles with no warranty. I have owned the truck for 3 years, and this summer I noticed the cold starting. I had an injector replaced in Washington State when I was there 3 weeks ago. The cold start was fixed and the truck runs great. Apparently when they replaced the injector they updated the software. First mountain pass I went over out of Washington I got the wrench light, which was associated with an overboost. This occurred when the truck was downshifting, and it never went into the red on the turbo pressure, but probably sensed the rapid rise. I fixed that problem by cycling the key off, and by not using Cruise control on long uphill grades.

Now for the next problem. I am now in Florida. Wrench light illuminated while going down the interstate. I pulled into a local small town Ford dealer, and they put it on the computer, and it showed a Temp correlation error. 13 degrees difference between EGR and Oil cooler, with the oil cooler being the warmer. The tech didn't think it should keep me from going to my destination which is here in the Tampa Bay area. I will be in this area for a couple of weeks. before heading back west.

I plan on taking the truck in to a Ford dealer for additional diagnosis tomorrow. Does any one have any insight on what I should tell the tech, and what I should expect? From my little research here I understand I may have an oil cooler going? I would hope I could get the truck fixed so I could keep it for a long time.

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post #2 of 4 Old 11-20-2012, 01:25 PM
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do you have a monitor? Edge CTS, Dash boss, scan gauge, etc... if not it you could really use one. Your oil cooler sounds like it is clogged. as long as the EGR is still in good shape you should be ok with a swap of the oil cooler. There are many helpful threads that are stickies in this section. I am sure another member will help me out. I am new and still learning.

welcome to the ORG. btw

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post #3 of 4 Old 11-20-2012, 04:12 PM Thread Starter
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No monitors at all. I did read all the stickys, and they are great..

I am thinking the ford dealership tomorrow will recommend a Oil cooler replacement. I am torn though. I wonder if I could make it to Houston where I could get a EGR delete, and cooler from Bullet Proof installed there. I just don't have enough information to know if I am chancing a blown head gasket going that far?
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post #4 of 4 Old 11-20-2012, 06:16 PM
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Get a monitor of some sort. Check the oil and coolant temps first thing in the AM to see how close they are. You may just have a sensor issue.

Mark
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