C180 w202 revving high

Discussion in 'Engine' started by Mercy_c180, Aug 27, 2011.

  1. Mercy_c180

    Mercy_c180 Member

    Messages:
    41
    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Hi folks, I have a 1997 c180.

    The problem is, the car is revving high, it goes to around 2000rpm then drops, it doesnt drop revs intantly it will rev for a short while, it only does this when the engine is at a warm temperature around 80'c. I have also noticed that when i rest my foot over the brake pedal, not pressing it, just shadowing it, when it revs high, the pedal drops slightly, when the revs drop the pedal returns slightly back up.

    What can this be? Ive looked for air leaks but cant spot any.

    Any help guys.

    cheers.
     
  2. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
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    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Anyone got any ideas? Its now stopped doing this and decided to idle at around 700rpm but then drops to 500rpm as though its going to cut out.
     
  3. OP
    OP
    Mercy_c180

    Mercy_c180 Member

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    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Anybody?
     
  4. MERC CLK 230 K

    MERC CLK 230 K Active Member

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    Location:
    kent
    Car:
    mercedes clk W208 230 kommpressor
    Sounds like may have go in to limp mode !
     
  5. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
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    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Oh right, I have got a light that keeps appearing on the dashboard, but the owners manual says thats for low coolant level, I have checked this and it is fine, does this light mean anything else other than what the manual says?
     
  6. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
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    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Would the fuel pump cause the same symptoms?
     
  7. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
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    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Can anyone see this thread haha? :p

    As above would fuel pump cause this, as thinking about it, the car is acting like its got fuel starvation, such as, the revs to begin with, and now the revs have changed to just dropping as though its going to cut out, and when I put my foot down (not thrashing the car may I add) it had a split second lag, then the power is there.

    Has anyone got any ideas at all, help/ideas would be greatly appreciated :thumb:.
     
  8. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
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    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Nobody got any ideas then?
     
  9. dog68

    dog68 Active Member

    Messages:
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    Location:
    cambridgeshire
    Car:
    Mercedes s500
    Maf sensor?
     
  10. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
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    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Is there any way to test this before I splash out on a new one?
     
  11. dog68

    dog68 Active Member

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    yes, disconnect it, if it runs better without, its gone.
     
  12. OP
    OP
    Mercy_c180

    Mercy_c180 Member

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    Aug 3, 2011
    Location:
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    Car:
    Mercedes-Benz C180 Esprit
    Ok mate Ill try that, thankyou for your response.
     
  13. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
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    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Well I tried the maf by unplugging it, and it ran worse. So it cant be that........any other ideas I can try, this is doing my head in now, anyone got any ideas please!
     
  14. horgantrevor

    horgantrevor MB Enthusiast

    Messages:
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    Jan 14, 2011
    Car:
    w202 c43 & w210 E220 CDI estate w219 W221
    best think is get it hooked up and read codes taker five min at local indie with star

    it could be many things such as faulty brake light switch under brake pedal

    also maf

    also fuel pump blocked fuel filter as or have you ever changed it they get forgotten about

    so codes read is best thing too so
     
  15. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
    41
    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Yeah I will have to get it hooked up.

    I changed the fuel filter about a week ago cause I thought it might be that, but no change.

    Cheers for reply.
     
  16. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
    41
    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Other than getting it plugged in for diagnostics, which Mercedes want £96 for the first hour then £106 each hour after (cheaper else where I know) Has anyone got a clue to this as the lag has got worse now aswell.
     
  17. OP
    OP
    Mercy_c180

    Mercy_c180 Member

    Messages:
    41
    Joined:
    Aug 3, 2011
    Location:
    Telford, Shropshire
    Car:
    Mercedes-Benz C180 Esprit
    Still getting this problem, its not as annoying now though as im used to it haha. Im going to be getting it booked in for diagnostic as soon as I get chance to do so.

    Also what do other w202 c180 drivers achieve MPG? This one is returning 40-45mpg, and sometimes more? Is that normal or have I got a rare one haha.
     
  18. Grahamcol

    Grahamcol Active Member

    Messages:
    388
    Joined:
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    Location:
    West Midlands
    Car:
    2000 W202 C280 and 2001 SLK230
    That mileage per gallon is exceptional, I feel. My C200 averages about 30 mpg, I guess, with a mixture of traffic and open road.
     
  19. fuzzer

    fuzzer MB Enthusiast

    Messages:
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    Buy a new calculator, because youre not getting 40-45MPG.

    35 tops! Ive had 3 C180's and not one has done anything more than 35.
     

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