Former VWDieselParts.com Forum

Coke wrote:"Im not convinced yet its my pump. Could be my starter, or marginal compression. Hard to say. hagar, do let me know what you find out with this new pump." I'm having a similar problem . The car has started OK all summer in the hot weather ,but was a little harder to start when e...

Quote:Here is what I learned about the dynamic timing system. ----the timing piston operates on differential pressure between main gallery in pump and inlet banjo. ----The advance is most important at maximum fuel injection ( say maximum power). I'm not sure your add on mechanical pump idea will wor...

QUOTE:How do I adjust internal pump pressure ?----most of it is simple ---the return-spring is a bit tricky. I dip it in acid to weaken it. ----I have not used it so far but I have a needle valve to slow down return flow. it is used after the orifice. Hagar: I guess you are talking about the spring ...

Yes loosen the locknut first . Turn the screw CCW to lean it . 1/8 turn at a time is lots.

Hagar : What do you think of the Bosch injector pump manual posted by Steve. What a find eh?