Sounds like you could be onto something there When i bought the car i was told that it had subtle engine modifications which included a chip. Ive had a look at the chip and it says COS4x4PH1, perhaps some of the more hardcore cosworth experts might be able to shed more light on as to what the chip is. The only thing i was able to liken it too is the superchips phase 1 chip which provides 310bhp. If this is the case maybe this is causing the problem as i still have the standard blue injectors Or on the other hand i could be completley wrong