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E320 no fuel at fuel rail cranks no start if i cycle fuel pump get no fuel to fuel ra

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Old Jun 26, 2019 | 06:10 PM
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98 e320
E320 no fuel at fuel rail cranks no start if i cycle fuel pump get no fuel to fuel ra
E320 no start cranks fine i disconnected fuel line at fuel rail and cycled the pump got no fuel at all to rail
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Old Jun 26, 2019 | 08:24 PM
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Jeff Reno,

Welcome

Check the main fuse box ((under the hood) - fuse #6 I believe, for the fuel pump to see if it's blown.
Also check the fuse box under the rear seat - read here
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Old Jun 26, 2019 | 09:32 PM
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98 e320
No start
Originally Posted by khomer2
Jeff Reno,

Welcome

Check the main fuse box ((under the hood) - fuse #6 I believe, for the fuel pump to see if it's blown.
Also check the fuse box under the rear seat - read here
Still wont start fuel pump fuse and relay good when i jump the fuel pump i get no fuel coming out of the line that connects to the fuel rail shouldnt there be fuel when pump is running to the rail?
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Old Jun 27, 2019 | 11:15 AM
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Originally Posted by Jeff Reno
Still wont start fuel pump fuse and relay good when i jump the fuel pump i get no fuel coming out of the line that connects to the fuel rail shouldnt there be fuel when pump is running to the rail?
When was the last time you checked/replaced your fuel filter?
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Old Jun 27, 2019 | 02:29 PM
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98 e320
No start fuel filter is new just been replaced
Fuel filter is new just replaced recently
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Old Jun 27, 2019 | 02:49 PM
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Any pressure at the rail?
Turn the ignition to position 2 and lmk what pressure it reads.

Edit:
When you checked the fuse box under the rear seat, did you check the fuel pump relay?

https://www.benzworld.org/forums/w21...ump-relay.html
Last edited by khomer2; Jun 27, 2019 at 02:52 PM.
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Old Jun 27, 2019 | 06:40 PM
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The pump should come for few seconds just by turning the key to position 2.
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Old Jun 27, 2019 | 06:57 PM
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Pump comes on relay good swapped with another good relay same thing
Originally Posted by kajtek1
Famous K40 ?
The pump should come for few seconds just by turning the key to position 2.
There is no pressureat fuel rail even when disconnected and turn key pump comes on for approx 5 seconds but no fuel comes to the line going into the fuel rail at all
Last edited by Jeff Reno; Jun 27, 2019 at 07:02 PM.
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Old Jun 27, 2019 | 07:00 PM
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Originally Posted by Jeff Reno
There is no pressureat fuel rail even when disconnected and turn key pump comes on for approx 5 seconds but no fuel comes to the line going into the fuel rail at all
Pull your Vmeter out and test the connectors where the relays are for power.
Also swap relays to make sure the relays themselves are functioning correctly.
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Old Jun 27, 2019 | 07:06 PM
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Relays good even disconnected wires at pump 12.7 volts even when cranking
Relay and fuse good disconnected wires to pump 12.7 volts even when cranking
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Old Jun 27, 2019 | 07:09 PM
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Originally Posted by Jeff Reno
Relay and fuse good disconnected wires to pump 12.7 volts even when cranking
And you tested the relay to ensure it's functioning correctly, right?
https://www.wikihow.com/Test-a-Relay

EDIT:
Did you confirm what kajtek1 stated?
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Old Jun 27, 2019 | 07:12 PM
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Pump comes on relay good swapped with another good relay same thing
Relay is good even swapped relay it works fine pump comes on for approx 5 seconds but still no fuel
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Old Jun 27, 2019 | 07:18 PM
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Originally Posted by Jeff Reno
Relay is good even swapped relay it works fine pump comes on for approx 5 seconds but still no fuel

Sounds like the fuel pressure regulator.
https://www.benzworld.org/forums/w21...s-no-fuel.html
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Old Jun 27, 2019 | 11:59 PM
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Originally Posted by Jeff Reno
There is no pressureat fuel rail even when disconnected and turn key pump comes on for approx 5 seconds but no fuel comes to the line going into the fuel rail at all
How do you know the pump comes on? Do you hear it? If the pump runs, but no fuel, you have pretty well narrowed problem.
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