Originally Posted by
costina
I would be looking at fuel pressure if you have not already checked.
Also what type of fuel system you running? Is the fuel getting hot?
I've the fuel pressure set to 3.5 bar at idle with vacuum off and 3 bar with vacuum on as per MSD instructions for the chip.
I have a GRP4 alloy tank with built in swirl pot (injection) being pumped up to the rail by a bosch 044. I've got a sytec fse adjustable fuel regulator.