5.4 engine issue....
Elder User
Joined: Nov 2010
Posts: 946
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From: Needville, TX
agreed...i have had ngk iridium plugs for 120k miles with no issues
Cargo Master
Joined: Jan 2012
Posts: 3,053
Likes: 21
From: Pittsburgh, PA
What about the O2 sensor? That is something that is required to heat up for proper function.
A long shot, but what about the fuel filter?
My Ranger does the exact same thing and I believe it is due to a vacuum leak in the brake booster. A Vac gauge could help you diagnose this part.
A long shot, but what about the fuel filter?
My Ranger does the exact same thing and I believe it is due to a vacuum leak in the brake booster. A Vac gauge could help you diagnose this part.
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
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Junior User
Joined: Dec 2009
Posts: 67
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I agree. Either that or coolant in the cyl. Very hard to diag..
How long does it take after stop to happen again?
Again its hard to diagnose. An experienced mechanic might have a much better chance at finding out whats wrong by just listening to how it runs.
or not running..
Dick
How long does it take after stop to happen again?
Again its hard to diagnose. An experienced mechanic might have a much better chance at finding out whats wrong by just listening to how it runs.
or not running..
Dick
It happens basically everytime the truck is started......doesn't matter if it's hot or cold........
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
You may want to read the link about the upstream O2 sensor.
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Nightintruder
1999 - 2016 Super Duty
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Aug 30, 2010 06:46 PM
