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99 & up 7.3L Power Stroke Engine & Drivetrain

Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks 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 7.3L Power Stroke engine.
  • 356K
  • 125M
  • 356K
  • 125M

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.
  • 238K
  • 90.3M
  • 238K
  • 90.3M

99 & up Upgrades and Aftermarket - 7.3L Engine

Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
  • 225K
  • 45.8M
  • 225K
  • 45.8M

Power Strokes 1994-1997 General

Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.
  • 203K
  • 48.6M
  • 203K
  • 48.6M

7.3L IDI Diesels (Not Power Strokes)

Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.
  • 162K
  • 47.4M
  • 162K
  • 47.4M
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  1. Tuned/deleted mileage for the non believers

    6.7L Upgrades and Aftermarket - Engine
    Believe it or not, the real mileage increase I'm seeing so far is at least 3 mpg. In the same conditions that always yielded 17-18 mpg, I'm now seeing 21-21.5. This is with a Mini Maxx, egr block offs, and a 4 inch exhaust. It's also very nice to not get any more fuel in my oil, waste fuel...
  2. P0046

    6.0L Power Stroke Engine and Drivetrain
    I am getting this code before and after the turbo was replaced. The truck has no bottom end power and is very jerky boost pressure the higher the boost gauge goes. Its an early build 03.
  3. ESOF, not working, no light on dash.....................

    99 & up 7.3L Power Stroke Engine & Drivetrain
    Okay, I have been doing a little reading and diagnosing of my 4x4. I have the Hubs Manually locked so the whole not having vaccum to activate the hubs is a non issue. First of all when I turn the 4x4 switch no light on the dash comes on, so I did the norm, checked the fuses Relays and such, so...
  4. 3406B vs. 3406C (425)

    General Diesel
    I know the C is built stronger but factory equipped does the C have the capacity to fuel as much as the B? Can the C be turned up as much or more than the B? What is the pyro limit on these motors? What is the max boost on the C? Thanks ahead of time.
  5. 2003 6.0L Oil leak

    6.0L Power Stroke Engine and Drivetrain
    please help, been leaking oil for about 20,000 miles and atleast 10 trips to the dealer. the slow drip comes off the bell housing right where the tranny meets the block. the rear main has been replaced i believe 3 times now, along with the valve cover gaskets, oil dip stick o ring and a few of...
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