Ihmad13

I fill up my tank drive and keep driving until it eventually cuts off and will not start back up until I refuel.....any ideas ? Just replaced fuel pump ,and fuel filter ....and also check engine comes on for fuel rail pressure too low .....fill up and drive again engine goes off after 4 cycles ...I'm lost !

rapidoxidation

Are there two fuel pumps on the diesel like on the gassers? Someone will be along shortly with the correct answer. If there is, I'll bet your transfer pump (moves fuel from one side of the tank over the differential hump to the other) isn't doing what it should be doing.

kajtek1

W211 has a saddle tank that uses venturi effect from returning fuel to suck fuel from passenger side to driver side where electric pump pushes it to engine. T
The Venturi require precision placement or will not work and your engine will run out of fuel with 6 gallons in passenger side saddle.
Did you have any job done on the tank?

Ihmad13

I replace the passenger side fuel pump assembly with all the hoses what other work do I need to get done

Ihmad13

I'm not familiar with the Venturi tank but just like you said you are correct you said when something needs to be done to the tank what is that

kajtek1

Sounds like this is the problem.
Now you have to go back there and make sure everything is done by the book.

Junkyard dog

Was thIs problem ever corrected?

Legodude

I replaced my pump this year. It is located on the passenger side.

Junkyard dog

it was fuel filter in my case. There is not enough pressure in returning fuel to create venturi. New filter was the solution.