wrench light on and power loss - Ford Powerstroke Diesel Forum
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post #1 of 21 Old 08-25-2019, 11:08 AM Thread Starter
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wrench light on and power loss

Does anyone one have any idea why the wrench light would come on and the engine stumbles while towing ? After this happened I slowed down and the light went off and everything was ok. the truck has 112,000 miles on it and the oil was just changed. I had this problem a month ago so I figured it cant hurt to change the oil because it was getting close to the service . I use Shell Rotella oil with a factory oil filter. The fuel filters were changed about 5000 miles ago. I am assuming I have an injector issue but not sure. Any help would be appreciated thank you.
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post #2 of 21 Old 08-25-2019, 11:37 AM
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Check your codes - i'll bet you have some that will point you (or us) in the right direction.

Just a hunch here, but i'll bet your oil ECT/EOT delta is too high and the loss of power you feel might be the truck defueling to try to head off an oil cooler rupture or worse.

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post #3 of 21 Old 08-25-2019, 11:42 AM Thread Starter
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The last time this happened I got no codes. I will check the codes and see what if any are in the computer right now
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post #4 of 21 Old 08-25-2019, 11:48 AM Thread Starter
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The only code I could pull up was P0000
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post #5 of 21 Old 08-25-2019, 12:14 PM
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The code thing is interesting. If you have a scanner and no codes show and you have a wrench, the truck needs to have codes read using Ford specific scanning tool like Forscan or find a garage where the guy has the right scanning tools which are really expensive. I had the wrench come on and couldn't pull a code with any of my 3 scanners including the SCT X4 scanning function. Took the truck to Dixon Auto in Hondo Texas and he pulled the code showing delta between coolant temp (ECT) and oil temp (EOT) exceeded the 15F allowed. Wrench would go away and only come back on longer rides of dragging my 5ver. A new oil cooler fixed the problem and work was done by M&W truck and auto in Devine TX as this was beyond my abilities. The wrench icon only seems to turn up for things that don't necessarily show in a CEL which I never had.

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post #6 of 21 Old 08-25-2019, 12:26 PM Thread Starter
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Ok thank you. I was going to the local ford dealer to have them pull the codes tomorrow to see if they got anything. We will see what they say. I was figuring on the injectors being the issue from all the info I have heard about th 6.0 problems starting around 115,000. Not sure if I by into all that but better to safe than sorry.
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post #7 of 21 Old 08-26-2019, 06:52 AM Thread Starter
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I was at the Ford dealer this morning and they were unable to pull any codes again. Nothing was stored, no pending and no active codes. Now I have wait to see what happens. Gotta love computers.
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post #8 of 21 Old 08-26-2019, 08:02 AM
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Get a monitor and start watching your truck's parameters. You can get an OBDII bluetooth dongle and the torque pro app for your android phone for <$25. I'm still going with the delta theory...

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post #9 of 21 Old 08-26-2019, 08:08 AM
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X2 on a monitor, add an EGT probe if you tow.

And @SSgt. Spike if you are military,(active or not) go into the User CP (upper right screen) go into Networking and join the military members group to get the banner under your screen name.
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post #10 of 21 Old 08-26-2019, 03:24 PM
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Gotta think if your truck is throwing the wrench icon, you have codes. Not arguing with your Ford mechanic but there are codes there. Forscan software and an adapter OBD II to your phone (not expensive) will pull the codes that are causing the wrench. Either that or find another dealer or shop with Ford specific scanning software. It is also a great idea to monitor your engine oil temp, the coolant temp and the exhaust temp. I can do this using my SCT X4 scanner which has gauges that read this stuff from the truck computer. I bought a nifty windshield mount bracket and use the scanner / monitor when dragging my 5ver especially.

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