2003 6.0 sudden power loss - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 04-30-2008, 07:24 PM   #1 (permalink)
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2003 6.0 sudden power loss

Howdy all I'm new to this forum and new to this problem I've got and I'm hoping for some help. Problem is:

Driving to work 2 mornings in a row and about a mile to 3 miles into my drive at about 30-45 mph, no load, the engine has a sudden loss of power and feels like it is going into a misfire. No smoke out the pipes and no CEL coming on. I can rev up the motor but it is holding back as if half if not more of the cylinders are not firing. If I sit and idle (rough) for about 3 minutes all of a sudden it starts running just fine and I continue on with no problem. Morning commute has been cold, about 33-38 degrees. Afternoon commute home I have had no issues at all.

Changed the fuel filters the first day of the problem and had no water in the drain relief and filters looked good. Took it into a very good friends repair shop (not a dealership) and he scaned and showed no codes.

Guys/Gals I'm in need of help. Ford dealer gave me a runaround when I talked the problem with them and I felt they were not willing to help. Has anybody out htere heard or seen this problem. Any feedback will be appreciated.

2003 F350 Crewcab 4X4 6.0
102000 miles
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Old 05-01-2008, 07:55 AM   #2 (permalink)
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I had a similar issue with mine. Check your main wiring harness for chaffing. Anywhere the harness touches it could be cut.
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Old 05-03-2008, 12:00 AM   #3 (permalink)
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i wrk at the dealer...deff. dont turn down buisness. check the icp sensor connection under the turbo. screws into the high pressure oil pump cover. seen some leak and cause some werid drive concerns.
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Old 05-04-2008, 12:10 PM   #4 (permalink)
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Thanks for the info. I haven't had much time to look at these issues this week but I want to discuss what I have done and see if it helps point anybody in the direction of this problem.

As I stated on my first post this problem occured on cold morning commutes. I decided to plug the truck in at night and when I start it in the morning to let it warm up for about 5 minutes before driving off....well I have had no sudden losses of power since doing this! This problem is starting to really show itself to me as a thermal issue of some sort.

Any ideas? Again....any help is appreciated!!!
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Old 05-04-2008, 06:56 PM   #5 (permalink)
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Quote:
Originally Posted by farmerflee View Post
Howdy all I'm new to this forum and new to this problem I've got and I'm hoping for some help. Problem is:

Driving to work 2 mornings in a row and about a mile to 3 miles into my drive at about 30-45 mph, no load, the engine has a sudden loss of power and feels like it is going into a misfire. No smoke out the pipes and no CEL coming on. I can rev up the motor but it is holding back as if half if not more of the cylinders are not firing. If I sit and idle (rough) for about 3 minutes all of a sudden it starts running just fine and I continue on with no problem. Morning commute has been cold, about 33-38 degrees. Afternoon commute home I have had no issues at all.

Changed the fuel filters the first day of the problem and had no water in the drain relief and filters looked good. Took it into a very good friends repair shop (not a dealership) and he scaned and showed no codes.

Guys/Gals I'm in need of help. Ford dealer gave me a runaround when I talked the problem with them and I felt they were not willing to help. Has anybody out htere heard or seen this problem. Any feedback will be appreciated.

2003 F350 Crewcab 4X4 6.0
102000 miles

Glow plugs going bad?? Maybe GP harness?
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Old 05-04-2008, 08:43 PM   #6 (permalink)
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I had allmost the same problem @ 85K. Dealer replaced 6 injectors.The tech said the plungers will tend to stick on cold mornings, by the afternoon temps are above 45 degrees, no problems. If you still have the original injectors, they are the c94's, and are probably going south on you.

Last edited by mpc; 05-04-2008 at 08:45 PM.
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Old 05-04-2008, 09:38 PM   #7 (permalink)
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What about sticking vanes on your turbo? Might check your intercooler and tubing as well.

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Old 05-05-2008, 04:10 PM   #8 (permalink)
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yea man deffinatley some injectors hanging up. do all day long. hope u still have 5/100 left. injectors are like 280 ech. sorta labory, bank 1 pain in u knw whut. bank 2 no biggie
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Old 05-15-2008, 12:19 AM   #9 (permalink)
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CAC tube

had same thing, would not go over 40. It was my cac.
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Old 05-15-2008, 12:39 PM   #10 (permalink)
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Originally Posted by OMCUSNR View Post
Glow plugs going bad?? Maybe GP harness?
How would this cause low power once the truck is already warmed up and being driven? Wouldn't it just make it hard to start?

Justin
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Old 05-15-2008, 06:47 PM   #11 (permalink)
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had same thing, would not go over 40. It was my cac.
Do you have a boost gauge? If so, can you correlate the problem with higher boost pressures? An air leak such as from your CAC (Charge Air Cooler) sounds very plausible. Check your system for small air leaks around the boots, etc.
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