Missfiring

[wacomuk]

could be or fuel reg is stuck, to much pressure or not enough maybe

you can check for boost leaks with a gas blow lamp. have the car running turn on the gas (don't light it) blow the gas on to and around anything that may be a boost leak. the revs will pick up if the gas is sucked in through a leak

check inside the dizzy cap

[adzs12]

Thats a good tip that is

[PukkaSilvia]

Very good tip. i like that too


HT leads failing under load could be another possibility, Or your ignition timing could be out

[sideways danny]

sounds like a boost leak, really lean at idle and seriously rich on boost

[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

[adzs12]

still sounds like a boost leak to me

[mr2sc89]

hey did ye have any luck with the missfire?

[bigtim]

Ive just had this problem with mine and Shaun suggested plugs so i changed them even though they looked fine and its cured it