1990 460 rough idle, stalls
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1990 460 rough idle, stalls
My 1990 F250 4x4 with a 460 ran great then all of a sudden has a rough idle, and as you go to step on the throttle will stall. I've pulled the codes, and get:
KOEO: 11
CM: 11
If I'm reading these right, that means according to the "system" it's fine
It starts right up, but is almost impossible to drive, unless your on some back road where you never have to stop.
KOEO: 11
CM: 11
If I'm reading these right, that means according to the "system" it's fine
It starts right up, but is almost impossible to drive, unless your on some back road where you never have to stop.
Fleet Owner
Joined: Oct 2005
Posts: 20,780
Likes: 1,746
From: Kentucky
Check the fuel pressure. Each tank has it's own in-tank high pressure pump. There is a common fuel filter and fuel pressure regulator so whatever the cause is will be common to both tanks. Very rare to have two bad pumps.
Could be as simple as a plugged fuel filter.
Could be as simple as a plugged fuel filter.
Fleet Owner
Joined: Oct 2005
Posts: 20,780
Likes: 1,746
From: Kentucky
The F-series gas engine trucks stopped using the three pump setup after 1989. 1990 and later trucks use the two pump system. Each tank has it's own high pressure pump.
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