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Fuel not being used from one saddle.

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E-Class (W211) 2003-2009

Fuel not being used from one saddle.

 
Old 01-28-2019, 07:06 PM
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2007 Mercedes benz E200
Exclamation Fuel not being used from one saddle.

Hello, the pump is not pumping fuel from the drivers side saddle. Please help. What could it be? Thanks.
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Old 01-28-2019, 07:18 PM
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bad transfer aka Venturi pump.
When the problem occurred? Usually it is mechanic who makes wrong assemble.
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Old 01-28-2019, 08:02 PM
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Well, it has always had a problem with the fuel level indicator. It never goes to empty. Recently, I had a mechanic check the fuel system and we found that the drivers side saddle was full and the other was almost empty, realizing thats why the fuel level indicator would never go to empty. A venturi pump, say more please. Is this something I need to change or move to correct place?
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Old 01-28-2019, 11:24 PM
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The saddle tanks use return fuel with Venturi pump to suck the fuel from passenger side saddle to driver side, where main fuel pump pick it up and sends to engine.
The "snorkel" you see on the picture is just it and if assembled at wrong angle, will not suck the fuel, leaving about 5 gallons of fuel that main pump will never get and engine will die.
Dual level sensor will show average, so you will have fuel shown on the dashboard, but engine will starve.



Last edited by kajtek1; 01-28-2019 at 11:28 PM.
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