Which regulated fuel return system?
Post Fiend
Joined: Feb 2002
Posts: 10,600
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From: Carhenge
I thought I read somewhere the logic behind the rear fuel feed is that the engine sits with the rear slightly lower than the front so air naturally tended to accumulate at the front of the fuel galley. I don't know, maybe I'n wrong, but that's what I thought.
Freshman User
Joined: Oct 2005
Posts: 31
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From: Peoria, AZ
Originally Posted by clux
I thought I read somewhere the logic behind the rear fuel feed is that the engine sits with the rear slightly lower than the front so air naturally tended to accumulate at the front of the fuel galley. I don't know, maybe I'n wrong, but that's what I thought.
Also, when you cycle the key to start the truck, and you're waiting for the WTS light to go out, you're moving fuel through the heads. Even if you have an air bubble sitting at the front of the head, by the time you crank the engine, it's likely already on it's way back to the tank (assuming you've got a return system of course).
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
I agree with AG. The theory makes sense that the air will "float" to the front of the head, but once that pump begins to cycle, how fast is the fuel moving through the head? Any air that may be in the fuel I don't see as having the time to leisurly float through the fuel to the front of the head.
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