One to think about
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
About the only thing I can think of now would be a bad HPFP. I don't think a pressurized system can ingest air, so if there was a leak somewhere on the HPFP, maybe at one of the valves, it would suck air and pressurize it in the high side of the fuel system.
As to how I would prove it? No clue!
As to how I would prove it? No clue!
Junior User
Joined: Jan 2010
Posts: 63
Likes: 0
how about making an appointment with your ford service center. the day before your app. take the truck and a set of car ramps there and park it overnight with the pass. side parked on the ramps so they will have to get it started in a simaler situation as your self. just an idea if your truck is still under warrenty.
Thread Starter
|
Postmaster
Joined: Feb 2006
Posts: 3,201
Likes: 4
From: waynesville, mo.
how about making an appointment with your ford service center. the day before your app. take the truck and a set of car ramps there and park it overnight with the pass. side parked on the ramps so they will have to get it started in a simaler situation as your self. just an idea if your truck is still under warrenty.
Lead Driver
Joined: Sep 2006
Posts: 5,665
Likes: 164
From: Cartersville, Ga
Could it be possible that the fuel supply line that goes between the fuel filter housing up along the passenger side valve cover to the pump could be back flowing past the check valve underneath the fuel filter and back into the fuel filter housing putting air into that supply line? The 6.4 HPFP cannot pump air like in the older HEUI designs where air can work itself out.
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
Could it be possible that the fuel supply line that goes between the fuel filter housing up along the passenger side valve cover to the pump could be back flowing past the check valve underneath the fuel filter and back into the fuel filter housing putting air into that supply line? The 6.4 HPFP cannot pump air like in the older HEUI designs where air can work itself out.
how is the air getting into the system..
Sam
Lead Driver
Joined: Sep 2006
Posts: 5,665
Likes: 164
From: Cartersville, Ga
Isnt there always a air bubble in the fuel filter bowl? When you remove the fuel filter the fuel is never all the way to the top.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
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
Thread Starter
|
Postmaster
Joined: Feb 2006
Posts: 3,201
Likes: 4
From: waynesville, mo.
Could it be possible that the fuel supply line that goes between the fuel filter housing up along the passenger side valve cover to the pump could be back flowing past the check valve underneath the fuel filter and back into the fuel filter housing putting air into that supply line? The 6.4 HPFP cannot pump air like in the older HEUI designs where air can work itself out.
Thread Starter
|
Postmaster
Joined: Feb 2006
Posts: 3,201
Likes: 4
From: waynesville, mo.
C'mon folks! Warranty time is almost up! Vehicles are stacking up waiting to be worked on. Wheres all them folks that say dealer techs are incompetent? I've done every test in the book (and some that aren't). Checked for restriction at the low pressure pump, checked to see if the fuel immediately out of the pump was aerated (test not in the book), bled low side and high side at the cooler, checked for biased frp sensor, changed #2 injector, changed all washers and o-rings on injectors, changed all lines to each injector and torqued all to specs. Independent garage techs, speak up. You're only too glad to do it any other time!
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
C'mon folks! Warranty time is almost up! Vehicles are stacking up waiting to be worked on. Wheres all them folks that say dealer techs are incompetent? I've done every test in the book (and some that aren't). Checked for restriction at the low pressure pump, checked to see if the fuel immediately out of the pump was aerated (test not in the book), bled low side and high side at the cooler, checked for biased frp sensor, changed #2 injector, changed all washers and o-rings on injectors, changed all lines to each injector and torqued all to specs. Independent garage techs, speak up. You're only too glad to do it any other time!
I thought it had a schraeder valve I used when I changed my fuel filter and it wouldn't start...
Sam