i had my injectors rebuilt and balanced with new tips and the car runs great but somtimes the idle is a little rough and the car is slightly shaky... and i get a lil bit of a maybe nailling sound, only at like idle tho when i give it gas all that stops... do u think my pressure valve seals could be going bad? 225k on the car/motor so i was thinking about replacing all of them if its not too much of a job... just for piece of mind and hopfully a better running more efficent motor,

does anyone know how replace these? i was reading and it doesnt sound hard but im a little confused on exactly where this seal is located and if the springs where each seal is could have an effect on the way it runs and if that can be replaced also..

thanks- Jason

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1985 mercedes benz 300D turbo diesel
1998 VW GTI VR6
1996 VW GTI 2.0
1999 saab 9-3 turbo
1987 300sdl (sold)