Hi folks
Have been struggling for the last couple of days with adjustments of my Bosch VE fuel pump. In the past I had someone fit a re-cored intercooler and at the same time they blanked the EGR and adjusted the fuel pump. I later found out that when they said they were "adjusteing the fuelling" what they were actually doing was screwing the smoke screw in a couple of turns. Yes it went better but also smoked up the road if you used the throttle off boost!
I decided to tackle this yesterday but I've made things far worse. I marked the Torx bit on the smoke screw and backed it off a little, then re-tested, smoking had reduced with little effect on power. Then I removed the top cover and checked the position of the diaphragm, and marked the position of the tick mark on the housing of the pump before making any adjustments. I turned the diaphragm through 90 deg and tested again.
This time I had absolutely no power and no smoke. I figured I must have trapped something somewhere or done something else stupid, but I've checked it 4 or 5 times since and can't find anything wrong at all. I've returned everything to stock - and I know this because my tick mark lines up with the wear mark on the eccentric pin surface. One thing I can't understand is that I can't see the pin that rubs against the eccentric shaft, even when I operate the throttle. Could the pin be stuck? If so how to release it? This would surely cause under fuelling?
Any help would be very gratefully appreciated. I need the car on the road in a couple of days time and at the moment I've rendered it useless!
Thanks
George