Question about 2005 Ford F 250 Super Duty

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Diesel - Loss of Power.> We are experiencing an intermittent loss of power on our 2005 Ford F250 super duty 4x4 6.0 liter diesel truck (45k miles on it). Description: While towing a boat, the truck loses power. When climbing grades the speed drops to 40-50 mph. Pressing the accelerator did not help, it was as though a governor was limiting the speed. If I backed off on the accelerator, the truck would eventually up-shift and increase speed (once we passed the steep part of the grades). This loss of power was not consistent as we were able to climb some steep grades at 70 mph while on some small grades we slowed to 40-50 mph. Also, using the 'tow/haul' button did not seem to change the truck's power output/speed. Also note that all fuel filters and the air filter were replaced after first experiencing this problem - with no improvement.

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6ya6ya
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Posted on Jan 02, 2017

  • 74 Answers

SOURCE: MAP SENSOR 93 GMC SIERRA 1500 2wd

youare dealing with a spark plug or sparkplug wire thats breaking down causeing a mist thats what your surge is i ypuld change both

Posted on Jul 07, 2008

  • 77 Answers

SOURCE: 2008 F250 Diesel

It sounds like a problem with your computer or injection system. the computer controls the amount of fuel put in the cylinders when you step on the gas. But it sounds like your truck's computer is having problems controlling this and when you accelerate hard or are towing and step on the gas, the computer just pumps diesel into the cylinders which causes the rough running(i assume misfiring and what not) and the loss of power. But when your not towing or accelerating hard, you are better controlling the amount of fuel going into the cylinders so there arent any problems. Go back to the dealer and tell them there is a problem with the injection system and it adds too much fuel when you try to get a lot of power out of it.

Posted on Oct 20, 2008

  • 135 Answers

SOURCE: 2005 diesel excursion when towing 8000lb

From your symtoms I would suspect a clogged fuel filter. It may seem to run okay without a load, but it requires a larger supply of fuel under load. Anything that restricts the flow of fuel will cause what you described.

Posted on Jul 06, 2009

  • 49 Answers

SOURCE: tow/haul light comes on gauge shows HOT

Does the trans fluid have a burnt smell and is it brown or dark brown as opposed to a red wine color? If this is the case then you may have a service issue caused by a clogged trans filter which is what this sounds a great deal like and the sooner you get the truck to the dealer or your mechanic the better as the trans in these are not cheap to rebuild or replace.

Posted on Aug 21, 2009

Shorty1_wt
  • 324 Answers

SOURCE: P301 Code on 2001 Ford Taurus SOHC (not FFL) with

P0301 Cylinder 1 Misfire Detected

perhaps the coil is weak? or maybe you got a bad plug or wire.

Posted on Jan 23, 2010

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