KimAndersen wrote:As you already have replaced the fuel filter is this now out of diagnostic plan, but there could
be other things there are restricting the fuel flow to and from the high pressure pump.
Is there a priming pump in the fuel tank or is the fuel being sucked from the tank !!!.
I have completely bypassed the filter because I know the plastic housing that the priming pump is situated on is renowned for inducing air leaks and the fault still occurred. I have a really good flow of fuel on the low pressure side.