Fuel delivery issue...
Thread Starter
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Senior User
Joined: Jun 2013
Posts: 107
Likes: 9
From: Valley Mills, TX
JRS I don't think that could be done you'd have to break open the actual pump itself and I dunno if that'd be worth the time, effort and parts just to re-install and find out you didn't fix a damn thing or messed it up worse than it was.
More Turbo
Joined: Mar 2003
Posts: 665
Likes: 6
From: Detroit suburb
Ok, here is a slightly different question. Are all the items shown in the pic inside the plastic housing which includes the fuel pump ? If so, some of the units not that expensive starting at around 40 it appears .....
Thread Starter
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Senior User
Joined: Jun 2013
Posts: 107
Likes: 9
From: Valley Mills, TX
So I am bumping this because I never actually tested that replacing the fuel pump fixed my cross fueling issue I just assumed it would. I dont use the rear tank the often but I figured this week when I filled up i would use the rear tank just to make sure everything was still working. Low and behold I am still expierienceing cross fueling issue.
Is the FDM witht he shuttle valve part of the pump or does it interact with the sending unit. What I did before was ditch the old pump but reuse the sending unit on the front tank. I find it highly unlikely that I recieved a brand new pump with a faulty FDM.....guidance please!
Is the FDM witht he shuttle valve part of the pump or does it interact with the sending unit. What I did before was ditch the old pump but reuse the sending unit on the front tank. I find it highly unlikely that I recieved a brand new pump with a faulty FDM.....guidance please!
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
No the shuttle valve is not part of the pump. It is a valve inside the FDM.
The pressure from the pump does open the shuttle valve in the FDM.
The sending unit just controls the fuel gauge and has nothing to do with the flow or pumping of the fuel.
The fuel pump:
The parts inside of the FDM:
Also look at the diagram in post #12 above in this thread.
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The pressure from the pump does open the shuttle valve in the FDM.
The sending unit just controls the fuel gauge and has nothing to do with the flow or pumping of the fuel.
The fuel pump:
The parts inside of the FDM:
Also look at the diagram in post #12 above in this thread.
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Thread Starter
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Senior User
Joined: Jun 2013
Posts: 107
Likes: 9
From: Valley Mills, TX
I didnt change the rear i changed the front pulled the fuel level sender off and re attached to the new pump.
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
Then if the front one is filling from the rear take the front FDM back and get another one and tell them it is bad.
Also try to get a different brand as I did hear that one manufacturer did leave the shuttle valve out of some and maybe you got one of those.
Also try to get a different brand as I did hear that one manufacturer did leave the shuttle valve out of some and maybe you got one of those.
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