The problem is that the van has a judder at low revs when driving at low speeds also has a slight hunting when slowing down. Tried the EGR VALVE, MAP SENSOR,FUEL PRESSURE ASWELL. WOULD APPRECIATE any advice or a Fix Thankyou.
About the only system not really monitored on these is the fuel supply,
Though if your scanner can do it a graphic scan of the fuel rail pressure might show up a glitch when this happens.
When was the last time the fuel filter was renewed?
And were the seals on the same good?
Might be it's sucking air.
It wouldn't be the first one of these to have a faulty/leaking filter housing.
Do the live data graph on the pressure.