Cars pulling back..

  1. #1
    As i press the throttle, mainly happens in second with high revs but happens in 3rd and 4th aswel, the vtr pulls back a bit then pulls alright again.

    Its due a service.

    I've been told its spark plugs 2 and 4.

    Would this be correct?
  2. #2
    could be the air combustion not correct with the fuel.