Rough idle when pointing up hill
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New User
Joined: Jan 2007
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Rough idle when pointing up hill
Would any one have any idea why my 85 F250, 6.9, 4 sp man, would run rough when it is pointing up hill. I am slowly going throught it and replacing most of the components, but it appears to have developed a miss while the front is pointing up hill. I have replaced the injector return lines, fuel filter, lift pump but still seem to be getting air in the system.
Any help would be greatly appreciated.
Thanks,
Troy
Any help would be greatly appreciated.
Thanks,
Troy
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Front uphill raises the amount of lift from the tanks to the lift pump.
So any air leaks between the tanks and lift pump would increase as well.
Is the stock water seperator still hooked up?
If it is, shove a bolt in the drain line.
The old water sepreators are famous for letting air into the fuel line.
So any air leaks between the tanks and lift pump would increase as well.
Is the stock water seperator still hooked up?
If it is, shove a bolt in the drain line.
The old water sepreators are famous for letting air into the fuel line.
Thread Starter
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New User
Joined: Jan 2007
Posts: 18
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Rough idle when pointing up hill
The stock water separater has been bypassed. The rough idle seems to be worse when it is parked and pointing up hill but still idling.
Thanks for you replies.
Will keep looking for air intrusion points.
Thanks,
Troy
Thanks for you replies.
Will keep looking for air intrusion points.
Thanks,
Troy
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
