upper filter
Fleet Owner
Joined: Nov 2003
Posts: 27,880
Likes: 3,592
Are you having any issues w/ poor performance or hard starts?
There are a number of things that could cause the filter to be empty, but most of them will show up as poor performance/starts.
Also - what year truck do you have (and any mods)?
There are a number of things that could cause the filter to be empty, but most of them will show up as poor performance/starts.
Also - what year truck do you have (and any mods)?
Thread Starter
|
Senior User
Joined: Sep 2007
Posts: 202
Likes: 0
It' a 2003. Yes it starts and shut off about 3 time before it stays running first time you start it for the day. (once in a while it will start normal) After you start it the first time it will run and start the rest of the day. I put a new stock fuel pump on and no difference.
Fleet Owner
Joined: Nov 2003
Posts: 27,880
Likes: 3,592
You may have a small air leak in the HFCM system. I would check that first - maybe make sure that the HFCM cap o-ring is not leaking for some reason.
The later year models modified the tubing from the HFCM to the secondary filter to include an "anti-siphon" loop. I suppose it was done to prevent what you are experiencing.
The later year models modified the tubing from the HFCM to the secondary filter to include an "anti-siphon" loop. I suppose it was done to prevent what you are experiencing.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
The small black "stand pipe" that holds the filter might need replaced or the FP regulator spring/plunger might be leaking. I don't have a detailed flow schematic of the secondary fuel filter housing so I'm not sure that either would apply, but that's the only two places I know that fuel might go back to. Does this happen with a full fuel tank also?
Senior User
Joined: Mar 2010
Posts: 141
Likes: 0
From: Eastern Oregon
Wonder if the sealing surface of the fuel regulator poppet valve could be damaged? Also keep an eye on your oil level to make sure the fuel is not going that way.
Read somewhere about a bubble test at the secondary fuel housing for another problem wonder if you are getting pressurized from that forcing the fuel out.
Read somewhere about a bubble test at the secondary fuel housing for another problem wonder if you are getting pressurized from that forcing the fuel out.
Trending Topics
Thread Starter
|
Senior User
Joined: Sep 2007
Posts: 202
Likes: 0
Yes, doesn't matter how much fuel is in it. It does it most of the time, but once in a while it will start the first time. But not often
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
I found this interesting tidbit for you also: 2005 Update Page 01 Running Updates
Seems like it must have been a common enough problem for them to re-engineer the fuel filter bowl and line.
Note that it is NOT backward compatible for older year model trucks.
My suggestion would be to let the fuel pump "cycle" once or twice upon first start of the day, just like you were changing filters OR add a check valve inline to prevent siphoning.
Seems like it must have been a common enough problem for them to re-engineer the fuel filter bowl and line.
Note that it is NOT backward compatible for older year model trucks.
My suggestion would be to let the fuel pump "cycle" once or twice upon first start of the day, just like you were changing filters OR add a check valve inline to prevent siphoning.
Thread
Thread Starter
Forum
Replies
Last Post
Delta2142
6.4L Power Stroke Diesel
6
Apr 21, 2013 12:34 PM