[Rossba]

Hi everyone,

I am running a AU XR8 engine that has started a surging type of problem whilst cruising at around 60kms/hr and has a slight flat spot just on the throttle from idle position.
If I slow down, go around a intersection then put the foot down to accelerate away there is the flat spot then surging before it accelerates.

The motor is bog stock and hasn't always done.

I fitted a low pressure fuel filter before the pump, replaced the pump and high pressure filter with little change.

Any suggestions on what it could be or if it could even be electrical.

Cheers Ross