85 6.9
Thread Starter
|
New User
Joined: May 2003
Posts: 12
Likes: 0
85 6.9
i need some suggestions. yesterday i took my truck and it started missing at top end . at idle i noticed alot of smoke mostly whiteish and smells like fuel. it idles fine but doesnt rev up all the way and misss at high end. i thinking possible bad fuel but im open for any ideas to look at. thanks
Posting Guru
Joined: Sep 2002
Posts: 1,897
Likes: 0
From: Northeastern Pa - USA
Could be air in the fuel - usually picked up in the return lines and I notice you have 85 (?) could be the water separator) or could also be a nozzle (injector) taking a crap. You may have a lift pump going bad, not supplying enough fuel to run at top end.
If you still have the firewall mounted water separator, try letting the drain slam shut and see if that helps. If its anything else you will have to track it down by elimination. Keep us posted.
If you still have the firewall mounted water separator, try letting the drain slam shut and see if that helps. If its anything else you will have to track it down by elimination. Keep us posted.
Posting Guru
Joined: Oct 2003
Posts: 2,438
Likes: 0
From: Monroe, WA
Just one cylinder missing won't even be noticable at the top end. I'd be thinking inj. pump. How many miles on it (the pump I mean)? An air in fuel problem should just make the throttle sort of strange (real snappy at first then sluggish right before it quits).
Thread Starter
|
New User
Joined: May 2003
Posts: 12
Likes: 0
im really not sure of the milage ive had it about 6months. i now it sat around a long time . it could be 50thousand or 150 . its strange that it just all of a sudden happened. the last time i drove it it run awsome. thats why i thinking the fuel because i just filled both tanks. sat afternoon will be the first chance to look at it and im looking just for afew more ideas to look for. it still has the stock water separator so im sure the problem could be in there.
Thread Starter
|
New User
Joined: May 2003
Posts: 12
Likes: 0
i looked this weekend and the separator was disconected and there is a presence of water . now im in the market for a new water sep.. i went to napa and they have one that looks like the fuel filter in the truck now . does any body make a filter for the truck with a petcock in the bottom? if the injection pump goes will it be alot of whitish smoke? it definatly smeels like fuel and i have no antifreese shortages and its cleen and the oil is to.
Posting Guru
Joined: Oct 2003
Posts: 2,438
Likes: 0
From: Monroe, WA
Usually a bad pump smokes blue. Where's the water, the main filter? I don't run a separator in mine, hasn't bit me yet.
Just filled it, huh. Sounds very suspicious.
Just filled it, huh. Sounds very suspicious.
Trending Topics
Thread Starter
|
New User
Joined: May 2003
Posts: 12
Likes: 0
i found a little in the filter it seems suspended. i think the best thing to do is put a new separator in and then try the truck. i have a feeling its the pump though.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Senior User
Joined: Oct 2003
Posts: 409
Likes: 0
From: New York
drain some fuel from each tank and some fuel from the filter into seprate soda bottles or cups that are clear. let them sit over nite and llok in the mroing to see if ya can see water the water will seprate out and be clear. Ya say ya have not run the truc in a while if there is water the water will make it not run rite and the fuel will grow bacteria that will plug the filter up. If there is water but not to much change the filter put some conditioner in the fuel and keep the tanks full. If there is alot of water ya will ahve to flush the tanks out. I recomend no matter hwat yar problem is before leaving the truck sit for anylenght of time to fill the fuel tanks full this keeps water from condenstaing in the tanks.
Thread Starter
|
New User
Joined: May 2003
Posts: 12
Likes: 0
after the problem started i did fill the tanks and tonight i plan to buy a separator and install it and ill run it for a while . i really cant drive it the way it is because it runs pretty rough.i put conditioner and cleaner and dry gas in the fuel but the problem is the truck does sit alot. thanks and ill keep you informed
Senior User
Joined: Oct 2003
Posts: 409
Likes: 0
From: New York
Ya might want to see if any local diesel shops or tractor dealerships have a hydrometer to test the quality of yar fuel. They take a reading and if it does not fall in a certain amount then ya have bad fuel that will give all sorts of trouble. Ima not so sure its bad fuel but that would be a quick way to elminate it as a culprit. I d also just look for stupid little things cracked lines t fitings etc. its proberly somthing little like that.