Flat spot at 3.5k rpm

Discussion in 'Engine' started by Pigpen, Oct 28, 2011.

  1. Pigpen

    Pigpen Active Member

    Messages:
    68
    Joined:
    Nov 11, 2009
    Location:
    London
    Car:
    C124 E320
    Hi all,

    As I'm doing less miles in the old girl recently I have allowed myself the pleasure of occasionally going mad and revving up to over 4k rpm once in a while without crying at petrol stations. I've noticed a flat spot at about 3k -3.5k rpm before it picks up again at 4k+

    I seem to remember when I was riding bikes at about the time the car was built that many of them had a flat spot built in to squeak past the noise regulations. Is this the same for these cars does anyone know?

    Cheers

    PP
     
  2. WG M-B

    WG M-B Auhorised Forum Sponsor Authorised Forum Sponsor

    Messages:
    1,898
    Joined:
    May 26, 2011
    Location:
    N/W london
    Car:
    C63 Wagon in black
    No flat spots built in on these!!!
    Usual suspects......

    MAF sensor
    HT laeds/ plug caps
    Wiring loom degrading
     
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