Hi

Thanks for your input.

The spec on the lift pump is 10cc per ignition on cycle. Isuzu say 'switch ignition on then off for three cycles giving 30cc off Riel's

As the lift pump didn't pump any fuel a new one was fitted with only a slight improvement.

I next checked the current and voltage of the SCV. When the engine faltered the current would rise about 250ma. This was not a lot compared to the Toyota SCV when faulty but enough to raise suspicions.

A new SCV was fitted and a re learn performed and the engine now runs well

Regards

Simon