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p1391 & p1393

99 & up 7.3L Power Stroke Engine and 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.

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03-08-2010, 01:25 PM	#1 (permalink)
ringo1bronc Junior Member Join Date: Feb 2008 Posts: 21 My Photos: (0) Feedback Score: 0 reviews	p1391 & p1393 99 f-250 flat bed with 114000 6 speed. It has a super chip set on safe tow. Today the two codes p1391 & p1393 came up. from what i gather it is glow plug circ low input #1 right & #2 left. Can someone please explain this to me. Do I need to replace my glow plugs or is it the harness?

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