Car still slow after MAS change

Discussion in 'Engine' started by PeterE320Cdi, May 2, 2008.

  1. PeterE320Cdi

    PeterE320Cdi Hardcore MB Enthusiast

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    S210 E300 DT, XC60 Past Cars: S210 E320 CDi (rusted into the ground), CLK 240
    My E class has been getting slower and slower so having read the various MAS/MAF posted I decided to get a new one from the Mercedes dealer. Fitted it last weekend and the car was better but still not as it should be.

    If I floor the accelarator it kicks down but will then change up at about 3,500 revs where before it would not change till around 4,500.

    Do you think I should take the MAS back and ask for a different one or are there other common problems I should check?

    Cheers, Peter.
     
  2. television

    television MB Club Veteran

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    Where did you but it Peter and what make was it
     
  3. KLP 92

    KLP 92 Hardcore MB Enthusiast

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    It will be a MB Pieburg one ;)

    Check for air filter blockage, cat blockage, leaking turbo pipes, EGR Valve and inlet port motor. Did i miss anything :D
     
  4. television

    television MB Club Veteran

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    My reason for asking was that there are some odd make replacements out there that do not last 5 mins
     
  5. Dieselman

    Dieselman Banned

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    Measure the voltage from Pin-5 of the MAF, just under 2V at idle and approx 4.5v at full revs.
    Being a parts jockey will just get expensive with no reward.

    I'd go with blocked cat if it has one.
     
  6. KLP 92

    KLP 92 Hardcore MB Enthusiast

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    Its says in the 1st post about acquiring it from a MB dealer :D

    I have the same car, i bought a MAS from MB and its Pieburg so i assume they're the same!
     
  7. tuikku

    tuikku Hardcore MB Enthusiast

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    .
    Leaking vacuum system ?
    Pressure converters ?
    What is boost pressure level ?
    Power increases “hand in hand” with boost pressure.
    If pressure don’t reach max level, power neither.

    What about smoke ?
    If boost pressure leaks, mostly there are lot of smoke too.

    If there is nothing in “false memory”, and no smoke.
    It might be some kind of boost pressure-problem.

    Maybe “learning “ transmission learns to change earlier, when it sees, that engine have poor power.
    When you get the power back, the transmission will be ok, too.
     
  8. television

    television MB Club Veteran

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    Yes I re read it last night so the fault will be else where and Dieselman could be right with blocked CATs
     
  9. Bazzle

    Bazzle Hardcore MB Enthusiast

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    Drive it real hard for a the next few starts and see if its just adaption.

    Bazzle
     
  10. OP
    OP
    PeterE320Cdi

    PeterE320Cdi Hardcore MB Enthusiast

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    Thank you everyone for the advice. I went on a 60 mile drive yesterday and it has cured the problem. I can not think why a longer drive would have sorted it so fingers crossed its not an intermittent problem.

    Cheers, Peter
     
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