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30 minutes between startup

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Ben Longden, Aug 2, 2020 at 9:09 AM.

  1. Ben Longden

    Ben Longden Senior Member

    Likes Received:
    May 30, 2010
    Echuca, Victoria, Austrayamate
    Your Mercedes:
    W203 220CDI. Silver with grey and black trim. 1992 W140 400SEL Silver. 1999 CLK430 (missus)
    Greetings all.

    A strange situation with the W140 400SEL 1992 .

    Ive had her off the road for most of the year, having some major work done on her, such as new steering components, a new rear drivers wheel bearing and suspension issues as well being sorted.. probably around $5000 of work.

    I brought her home and the mechanic said she was developing a strange issue; you could start her from cold, and run her, or take her for a drive.
    But if you stopped the engine, there was NO WAY she would restart in under 30 min. You could crank the engine till the cows came home and nothing.

    I noticed a leak from the pumps at the rear drivers wheel and had that hose replaced as it was leaking fuel. I thought there may have been low fuel pressure at the engine, but this seems not the case.

    Plugs seem fine.
    Fresh fuel put in.
    New spark leads 50,000km ago.

    Any ideas?
  2. CowleyStJames

    CowleyStJames Senior Member

    Likes Received:
    Oct 13, 2015
    Your Mercedes:
    Mercedes-Benz C-Class Estate C200 CDI BlueEFF. Executive SE 5dr
    Fuel evaporation?
    Have you checked for fuel at the injectors during cranking?
  3. malcolm210

    malcolm210 Senior Member

    Likes Received:
    Aug 21, 2005
    Does the engine have a distributor cap and rotor if so condensation could be building up in the cap residual heat from the engine will clear the issue in 20-30 mins? A new cap and rotor will solve the situation my 300TE suffered from this at circa 70k miles hairline cracks in the cap being the problem
    Blobcat likes this.

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