My 86 Gt was breaking down at around 5000 rpm with the stock injectors.I installed 30 lbs injectors and a mass air calibrated for the injectors.The fuel pressure is 80 psi at around 8 lbs of boost it still bucks and jerks at 5000 rpm.Would this be a fuel problem or ignition.I still have the stock ignition with a msd blaster coil ,motorsport wires and new plugs with a heat range colder.The dyno in my area the wide band o2 they used is not working.so i xcan,t really tell if it,s a rich or lean condition.Pulled plugs insulator is white tip is a greyish color.Any help would be appreciated would like to take itto the track this weekend. ....I have total advance timing set at 32 with thw boost retard at 1 Any advice would be appreciated...
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