advise needed... my 1992 4x4 saph has a slight miss fire when in boost. at around 3500-4000 rpm its hesitates slightly. if you bring the car up to boost gently its happens less. the car is totally standard apart from a 4" scorpion exhaust. Its happens more if the fuel is low(1/4 tank).
so far all ive tried is new plugs. was advised to use 071 plugs gaped at 0.9 to 1.05. these made the car run lumpy so took them out. ive been advised to try new ht leads... Can anyone recommend a brand?
Any other hints/tips welcome