Replaced the copper sealing washer at the bottom of injectors (leaking compression gas) now engine will not pull the skin off a rice pudding. Suspect fault may be one of the injectors, has anyone come across this problem, do you know where I can have them tested (siemens injectors) they have been put back to the cylinder removed from but I dont think there coded anyway, also believe Ford may have special bulliten but cant get hold of any info. no fault codesin system