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W211 low fuel pressure under hard acceleration star code 22e7

Discussion in 'Introduce yourself' started by mshah70, Jun 8, 2018.

  1. OP
    mshah70

    mshah70 Senior Member

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    Your Mercedes:
    Mercedes w211 2007 E220 Cdi
    The kit has arrived.

    I have a question, according to DAS i need to enter the number of graduation lines on the bottle(from original tester kit) after the test is complete.
    Does anybody know how many ml is 1 graduation line from that particular bottle shown in DAS. so i can compare it to my bottle, and use DAS to do the test.
    Otherwise i can follow guidelines above.
     
  2. OP
    mshah70

    mshah70 Senior Member

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    Your Mercedes:
    Mercedes w211 2007 E220 Cdi
    Test result
    Injector leak off test

    Under idle:

    Injector 1: 50ml
    Injector 2: 48ml
    Injector 3: 50ml
    Injector 4: 48ml

    Under full throttle:

    Injector 1: 38ml
    Injector 2: 36ml
    Injector 3: 100ml
    Injector 4: 36ml

    So i take that injector 3 needs replacing?
     
  3. alexanderfoti

    alexanderfoti Moderator

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    I would agree with that.
     
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  4. bembo449

    bembo449 Senior Member

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    get em all done but at the very least get 3 done pal
     
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  5. OP
    mshah70

    mshah70 Senior Member

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    Thank you guys for all the advice.
    It was really helpful.
     
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  6. Westheath

    Westheath Senior Member

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    Did you clamp off the injector spill pipe return feed ?
    When you remove the injector number 4 spill pipe injector connector
    you need to clamp off the fuel return.
    Believe it or not I've had some strange test results not clamping off the return on some engines.

    Step 4 in this link.

    http://pmmonline.co.uk/technical/common-rail-diesels-how-to-undertake-a-fuel-return-flow-test/
     
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  7. OP
    mshah70

    mshah70 Senior Member

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    I did not have a clamp at hand, but i covered the ends of the connectors with plastic caps that came with the kit, a bit of a loose fit, however when running the engine i kept a close eye for fuel coming back out of the connectors, lukily there was no fuel coming out of tge connecters.

    Now my question is, are the clamps put in place ‘solely’ to stop the fuel coming back out?
    And just say there was no fuel coming out, and no clamps in place, does that mean the test was not ok?

    Or isit the case that ONLY if fuel comes out that it can have an effect on the test results?
     
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  8. bembo449

    bembo449 Senior Member

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    I think your test was ok and an extra clamp would not have changed anything pal but I think westheath is rightly sharing is experiences with regular dealings on spill testing , if you are refurbing the set then it doesn't really matter anyway right ?
     
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  9. OP
    mshah70

    mshah70 Senior Member

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  10. alexanderfoti

    alexanderfoti Moderator

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    I think that is pretty clear cut.
     
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  11. bembo449

    bembo449 Senior Member

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    hardly any resistance on that 3rd injector at all
     
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  12. OP
    mshah70

    mshah70 Senior Member

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    Guys just wamted to know, do i use a flat reamer or an angled reamer to clean the injector seat on merc e220 w211?
     
  13. Westheath

    Westheath Senior Member

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    Last edited: Jun 18, 2018
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  14. OP
    mshah70

    mshah70 Senior Member

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  15. Westheath

    Westheath Senior Member

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    Too far from me to help.

    The cleaning kit from MB has tapered brass plugs for the injector nozzle holes so nothing can enter the cylinder during clean up process.

    A wood dowel with emery paper glued on the end can do the same job polishing the injector seat.
     
    Last edited: Jun 20, 2018
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  16. OP
    mshah70

    mshah70 Senior Member

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    I have successfully changed the injector today.

    After replacing injector suddenly i can hear my fuel pump making sound, sounds like theres air in the system and makes a knocking sound from the rear seat.

    Any ideas any1?
     
  17. Westheath

    Westheath Senior Member

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    Purging the air from the fuel system after the repair.
    Also............
    Check for leaks on fuel hoses, connectors and leak off pipes.
     
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  18. OP
    mshah70

    mshah70 Senior Member

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    Would u be able to direct me in how to purge the air from the system?
     
  19. OP
    mshah70

    mshah70 Senior Member

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    The injector cleaning brush kit u mentioned, i managed to get it slightly cheaper from the main dealers. Its a very good kit.
     
  20. OP
    mshah70

    mshah70 Senior Member

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    I opened the fuel filter inlet pipe to get air out of the system, but seems like nothing came out.
    Fuel pump still making knocking sound. And can hear air travelling through.

    Please help
     

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