Hi Guys, I have a 2.5litre Merc EFI and this engine only likes to run at one speed and thats at W.O.T . It really dosent like to idle and always cuts out when approaching the dock etc. I was told to change the plugs and ok this did help a little bit but the problem is still there. It has good fuel pressure on top of the fuel rail as we tested this with a fuelpressure gauge. Does anyone know what the timing should be and could this be the problem . thks DON if you read this as you have helped me out before on another motor . barry