My '82 300SD has almost no acceleration. It seems to run smooth but has no get up and go. Especially from a dead stop. It acts like it is not getting enough fuel. Once you are going it gets a little better , but not like it should. any ideas?

The line carrying the boost signal from the intake to the aneroid (top/rear of injection pump)is probably plugged.

It is probably plugged where it goes through the overboost protection switch-over valve. If you have a vacuum/pressure gauge, verify that you get 10psi of boost pressure at the aneroid under full throttle.

If you do not, then back track the line to the hollow bolt where it comes from the manifold, testing each section for boost pressure.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

that was it , the hollow bolt was plugged at the intake.

thanks