Low fuel pressure
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Freshman User
Joined: Aug 2007
Posts: 36
Likes: 0
From: Spring Branch, TX
Low fuel pressure
I have a 2015 f350 dually 6.7 that has left me stranded 5 times due to a low fuel pressure problem. Dealer claims that it is fixed, but a week or 2 goes by and once again I'm stranded in limp mode. Each time before it breaks down there is a low pitch whine coming from the water separator area. Any ideas? I guess I need to start the lemon law process.
Hotshot
Joined: Oct 2006
Posts: 10,147
Likes: 7,975
From: Texas
I have a 2015 f350 dually 6.7 that has left me stranded 5 times due to a low fuel pressure problem. Dealer claims that it is fixed, but a week or 2 goes by and once again I'm stranded in limp mode. Each time before it breaks down there is a low pitch whine coming from the water separator area. Any ideas? I guess I need to start the lemon law process.
Go for the lemon law, if you can.
Good luck
Posting Guru
Joined: Apr 2007
Posts: 2,402
Likes: 3
On my 14 I replaced two low pressure pumps. The next time my low pressure light came on I knew it couldn't be the pump, it had to be something in the tank. After begging the dealer to drop the tank, they found the sender assembly screen had become detatched causing a blockage. They removed tank, installed new sending unit and it's been great since. I replaced the low pressure pump myself, its really easy takes about an hour. I actually carry a spare pump in the truck. You can buy the Motorcraft pumps on Amazon for $230. When is the last time fuel filters were replaced? If they were just done, maybe the bottom of the frame mounted filter is loose. Maybe the green gasket is twisted and not sealing right.
Hotshot
Joined: Nov 2013
Posts: 10,107
Likes: 96
From: Hempstead, TX
Another common culprit is the cardboard top on additive bottles. If not careful when adding, they have been known to stick to the top of the bottle, and then fall into the tank and cause intermittent low pressure issues and starving the low pressure pump. It gets missed a lot and can only be found by dropping the tank and pulling the sending unit out.
Cargo Master
Joined: May 2012
Posts: 2,616
Likes: 1,190
From: Door Cty/Florida
Another common culprit is the cardboard top on additive bottles. If not careful when adding, they have been known to stick to the top of the bottle, and then fall into the tank and cause intermittent low pressure issues and starving the low pressure pump. It gets missed a lot and can only be found by dropping the tank and pulling the sending unit out.
bruce...
Logistics Pro
Joined: Mar 2005
Posts: 3,530
Likes: 2,494
From: West Michigan
yep. that's why I pry them out as soon as I open a new bottle. I use standadyne, and usually buy 4-6 bottles, and a case of half gallons, and then keep refilling the bottles. those cardboards as the first thing to go.
Cargo Master
Joined: May 2012
Posts: 2,616
Likes: 1,190
From: Door Cty/Florida
Without the cardboard disk, the bottle leaks some when it sits in the rear passenger door. I keep a box of 1 gallon zip lock bags in the truck to clean-up after my 9 pound dog. The one gallon zip lock bag holds the PM-22 bottle perfectly and captures any small spills.
My 9 pound dog does not tend to poop out a gallon of goodness, my hands fit better in this size bag than the sandwich sized zip lock bags.
bruce...
My 9 pound dog does not tend to poop out a gallon of goodness, my hands fit better in this size bag than the sandwich sized zip lock bags.
bruce...
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Freshman User
Joined: Aug 2007
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From: Spring Branch, TX
Truck got towed to dealer today. On the frist service they replaced the pump/water separator, 2nd time they replaced fuel line, 3rd trip sending unit got replaced and tank and other areas checked for debre metal shavings ect, 4th time fuel lines again, that was 2 weeks ago.
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Thread Starter
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Freshman User
Joined: Aug 2007
Posts: 36
Likes: 0
From: Spring Branch, TX
Another common culprit is the cardboard top on additive bottles. If not careful when adding, they have been known to stick to the top of the bottle, and then fall into the tank and cause intermittent low pressure issues and starving the low pressure pump. It gets missed a lot and can only be found by dropping the tank and pulling the sending unit out.
Logistics Pro
Joined: Mar 2005
Posts: 3,530
Likes: 2,494
From: West Michigan
I agree. I keep a 5 gallon bucket with a lid in my bed with 6 bottles, along with jumper cables, tie-downs, etc. I used to keep my bottles in the rear door pockets, until I saw those spills too.
Post Fiend
Joined: Jan 2009
Posts: 6,521
Likes: 11
From: Greenwood, SC
I could be wrong, but your response to that bill could be "no thanks, just put all my original fuel system parts back on the truck. The only thing you will bill me for are shop hours."
New User
Joined: Jul 2016
Posts: 10
Likes: 0
From: Washington
I got to ask - what did you end up doing...I just got the phone call, after asking them to look for the cardboard in the fuel tank as suggested via this thread, that they found the same thing! Told me the approx. bill due to labor right now, and I don't understand how warranty is not covering it - especially since the fuel additive is listed as proper maintenance in the owners manual.
Lead Driver
Joined: Dec 2013
Posts: 9,762
Likes: 115
RVTEC,
I got to ask - what did you end up doing...I just got the phone call, after asking them to look for the cardboard in the fuel tank as suggested via this thread, that they found the same thing! Told me the approx. bill due to labor right now, and I don't understand how warranty is not covering it - especially since the fuel additive is listed as proper maintenance in the owners manual.
I got to ask - what did you end up doing...I just got the phone call, after asking them to look for the cardboard in the fuel tank as suggested via this thread, that they found the same thing! Told me the approx. bill due to labor right now, and I don't understand how warranty is not covering it - especially since the fuel additive is listed as proper maintenance in the owners manual.
I missed the part about proper maintenance being to put the cardboard circle in the tank.
Now if the dealer ever added the additive to your tank - you have a case against the dealer.
The part of the Ford that markets/makes the additive could potentially be liable, but that is going to be tough to get them to cover it.
Mountain Pass
Joined: Feb 2010
Posts: 217
Likes: 0
From: Washington State
To reduce the chance of the cardboard from the PM 22 cap falling into the tank I pour the additive into a measuring cup. Yes another step I know but I've done this procedure for filling my diesels with fuel additive the last 20 years.