Yeah if it turned out to be a injector prob id do that ^

I had the same problem with my EA. Each time it was a dirty injector/s. Over a period of 4 years I had the injectors cleaned 3 times. After each clean the car would run beautifully for about 6 months then start to play up again. Eventually I would get the injectors cleaned once more.
Cost to clean back then was $20ea once I had removed them.

One of the reason why I wont own another dual fuel car.