Torque Cars

1997 c230 loss of power

Discussion in 'Mercedes Forums' started by jmc6633, 20 March 2008.

  1. jmc6633

    jmc6633 New member

    Messages:
    6
    From:
    Scotland
    Car:
    Mercedes C230 sport
    My 2.3 seems to lose power at 40000 RPM
    even at stand still it will only go to 4000rpm even though the pedal has still loads of room it is as if it is limited
    have new plugs new air filter new HT leads the only thing i have yet to replace is the fuel filter

    Can any body help ?
     
  2. ascaudio

    ascaudio Torque Junkie

    Messages:
    113
    From:
    swindon
    definatly change fuel filter then look at the breathing exhaust and airfilters easiest way to stop power is restrict the air flow
     
  3. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,202
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    Can you move the throttle on the engine air inlet, get someone to wiggle the accelerator so you can see which cable it is. It might be a problem with the cable. The airflow meter could be soiled, does the butterfly valve fully open? Is the AFM clean or covered with oil and grime? Is the engine in limp home mode? Have you just bought the car or owned it a while?
     
  4. pgarner

    pgarner TC ModFather Moderator

    Messages:
    16,522
    From:
    Lockerbie, SW Scotland
    Car:
    Octy smoke machine
    sounds like the airflow meter may have packed up. try disconnecting the wiring plug from it ( should be the 1st set of wires after the airbox ) and try running it again.

    this will put it on a generic map so dont try and go crazy with it

    if it works take out the meter and clean out with a solvent cleaner then reconnect. Although this is just a short term fix you may need to change it.

    other plan is take it to Merc and get a diagnostic done on it. it will show up if the airflow meter is dirty / knackered as less air than normal will be flowing past
     
  5. jmc6633

    jmc6633 New member

    Messages:
    6
    From:
    Scotland
    Car:
    Mercedes C230 sport
    New fuel filter no change
    Air flowmeter cleaned no change
    Tried with MAF disconected still not able to rev over 4000
     
  6. jmc6633

    jmc6633 New member

    Messages:
    6
    From:
    Scotland
    Car:
    Mercedes C230 sport
    Have had the car 6 years it had 50k on it
    it is now at 130k never mised a beat till now.
    kept serviced and frequent oil changes
    still drives well just will not go over 4000 revs
    can still achive 100mph + but will not allow revs to exceed 4000 bit like the rev limit
    has moved ??
     
  7. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,202
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    Been reading up on this. The Merc engines will not rev to over 4000 if the car is stationary. It could then be the speed sensor which is not telling the engine you are moving.
     
  8. jmc6633

    jmc6633 New member

    Messages:
    6
    From:
    Scotland
    Car:
    Mercedes C230 sport
    Thanks for yor help
    disconecting the neutral lead and reconecting has curred it
    Car is now performing like a teenager again
    plenty of power able to Red line again. (So to speak)
    Nice to have the horses back
     
  9. jmc6633

    jmc6633 New member

    Messages:
    6
    From:
    Scotland
    Car:
    Mercedes C230 sport
    :)Thanks for yor help
    disconecting the neutral lead and reconecting has curred it
    Car is now performing like a teenager again
    plenty of power able to Red line again. (So to speak)
    Nice to have the horses back:twisted:
     
  10. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,202
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    Glad you got it sorted. Keep in touch and let us know how you get on!
     
  11. hez

    hez Newbie

    Messages:
    2
    From:
    kenya
    Car:
    mercedes c200 1994
    Just joined the forum,I mine (mercedes 1994)has a similar problem,not so familiar with the neutral Lead,where is it located?
     
  12. T9 man

    T9 man TC Pro Founder Moderator

    Messages:
    20,370
    From:
    London, UK
    Car:
    Saab 9-3SS T9
    Greetings hez and Welcome to our TorqueCars Forum my Friend!

    Good to have you along with us :)
     
  13. hez

    hez Newbie

    Messages:
    2
    From:
    kenya
    Car:
    mercedes c200 1994
    Thanks,happy to be here..do you have an answer to my query
     
  14. T9 man

    T9 man TC Pro Founder Moderator

    Messages:
    20,370
    From:
    London, UK
    Car:
    Saab 9-3SS T9
    No buddy which is why you don't see one! ;)

    I am sure someone who is more familiar with your model car will have the answers that you seek and post it up soon :)
     
  15. turbonutter69

    turbonutter69 TC ModFather Moderator

    Messages:
    18,968
    From:
    Alone in the dark.
    Car:
    Insignia SRI.
    Welcome to the forum mate. :)


     

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