surging symptoms

[Pezzer]

Hi all, latest problem is as follows, any help would be great.
start vehicle and drive for 10mins all good, then pull away and it surges continually until foot is off accelerator and then re applied. All good until foot backs off,then depresses again and it starts to surge again. This happens on both gas and fuel just spent a few thousand sorting all the issues out before Crimbo and its been fine on long trips.

[lhurley]

Sounds electrical. My guess would be failing alternator and/or battery.

[mudnut]

If trouble is on both fuels it could a vacuum leak that opens as the engine heats up. Or it could be an ignition component that is failing when it gets warm. I've had a coil do that and also a condenser which would break down after 10 - 15 minutes. Remind me which engine you have, Pezzer.

[Ryangtd42]

check the timing and coil mate