How do you set the start of delivery on a 1976 240D (115 chassis)? There are not two rows of adjusters on this one, on the top, only the tubes going to the injectors. My mechanic was afraid to touch those as the manuals we had didn't identify if removing the valve and spring would also unadjust the pump. Also, where are the bolts for setting this? We think we found the big bolt in front of the injector pump, but have no documentation on it. Any help and/or pics would be greatly appreciated. Was getting unburned fuel out of tailpipe, but that is subsided, but still getting letting lousy mpg.

Vicki in MOntana