Really need some help

[tonyrcart]

Hi every one iv owned my 1.6 stilo 02 plate for just over 6 months now and have had an on going problem of missfire/juddering its not somthing that happens all the time I can do 500 miles or so with no problems but when it's bad it's bad the dash lights up with engine warning lights and also ghost faults ( number plate build , air bag ) it's been into several garages now with the same result Sod all done all they tell me is I have a injector problem but the injectors have all been check along with the throttle control unit and all plugs and coil packs been replaced iv fitted 2 new earth straps and have checked and cleaned all electrical connectors on the car. Please does any one know of a proper garage that won't just look at a pc and go that's what the problem is when I know it's not.