Missfiring

[smoker]

Thanks for the replies . I tryed checking for leaks with the gas lamp but that didnt show anything up. Engine runs fine on normal boost so I figure the fuel pump isn't supplying enough fuel...I did a check and it pumps about a litre pop bottle full in 30 seconds . ..I guess my next move is to fit the walbro 255 fuel pump in case mine is getting tired and starving the engine of fuel at high boost