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External,electric fuel pumps still the norm on MB?

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Old Sep 6, 2005 | 10:45 PM
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CE750's Avatar
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From: FL410
'05 E320 CDI, '08 BMW X5 4.8i, '11 Duramax 2500HD
External,electric fuel pumps still the norm on MB?

It used to be on the older MB's you could hear the sound of the fuel pump when you stood behind the car while it was running.. do they still use those external pumps back by the fuel tank? or are they engine driven pumps now?
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Old Sep 6, 2005 | 11:17 PM
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2011 VW cc, 2004 ML350
ML(163s at least) pump is electric, and inside the tank.
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Old Sep 7, 2005 | 12:03 AM
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Originally Posted by CE750
It used to be on the older MB's you could hear the sound of the fuel pump when you stood behind the car while it was running.. do they still use those external pumps back by the fuel tank? or are they engine driven pumps now?
Does anyone use mechanical pumps anymore for gasoline engines? They can't generate the higher pressures needed for today's F.I. engines.
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Old Sep 7, 2005 | 12:24 AM
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From: FL410
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Originally Posted by E55AMG99
Does anyone use mechanical pumps anymore for gasoline engines? They can't generate the higher pressures needed for today's F.I. engines.
That's actually the opposite of what I thought. In aviation at least, mechanical pumps are the only pumps capable of high pressure.. and as you may (or may not) know the CDI is 23000PSI.. so I was wondering if it was electric or mech... or both?

Sad thing is the Dealer didn't know!
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Old Sep 7, 2005 | 12:29 AM
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Yes, diesel is a different animal altogether.
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