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2002 C240 will not start

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by cdrichardson, Dec 5, 2012.

  1. cdrichardson

    cdrichardson New Member

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    Hello I bought a 2002 C240 for my daughter last year and I recently changed out the CPS and the fuel pumps within the last 3 months. The car is still not running and will not start the car smells of gas fumes and loses power or just shuts off completely. What could be the problem? I took the car back to the mechanic who replaced the pumps and he said that it was the SAM I am not convinced because this guy has burned me twice already with the pumps not being done correctly. I am so upset about it that I could scream. Any suggestions?:(
     
  2. television

    television Always remembered RIP

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    I am not sure on this, could it be the MAF, it could be worth unplugging it and see if the car runs better
     
  3. OP
    cdrichardson

    cdrichardson New Member

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    2002 C240

    Thank you so much for that recommendation, is that a pricey part to replace? And where is the MAF?
     
  4. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    Even if the MAF had failed the engine would still start and idle albeit roughly. You man says its the SAM, on what basis? The SAM just provides power to the pumps, not regulate the pressure, so if the pumps are priming and working his diagnosis is incorrect.

    Basics first as always, fuel pressure. Has it been checked? Check it at the rail and also check it at the filter. My guess would be the pressure regulator in the filter has failed, a common fault causing non start issues that is often over looked by many.
     
    Last edited: Dec 8, 2012
  5. television

    television Always remembered RIP

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    Your Mercedes:
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    Yes the regulator when bad can cause lots of cranking, but the car would still start in my case.

    In the case of the MAF, I have had one so bad that sure it would start, gut if you touched the throttle it stalled
     

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