[Lynn Eades]

Paul, about all I know of a Morris Commercial is that they have 4 wheels. However I imagine a mechanical fuel pump and the delivery pressure from one of these is probably about 2 to 3 psi. if your electric pump is delivering any more it can push the needle off the seat and may be giving you a higher than normal float level. This will likely mess up the idle circuit. You might need to fit a fuel pressure regulator? I would put a gauge on it first.