300SD Adjusted valves by the book, now won't rev ???

n/aI am new to Mercedes and just bought a nice running 1982 300SD. I wanted it to run nicer so I adjusted the valves. Now it acts as though the throttle is not connected, but it is. Can't hardly get it above idle, even when I push the throttle rod at the injector pump. Starts easy, sounds good,
no smoke. I rechecked the valve adjustment, it is spot on .004 intake, .014
exhaust. I had layed the linkage over to the side, don't think I bent
anything-but the speed control actuator does feel limp wristed-that is no
tension. I double checked linkage-seems correct-the rod to the injector pump has about 3/4 to 1 inch of travel-is that normal? Don't know how I could have
changed that. Could the supply pump coincidentally failed? All hoses in right
place. I am scrating my head, any help appreciated.

Forums

Diesel Engine Specific Aid

Chassis Model Number

W126

Troubleshooting the problem

If it was not doing this before you worked on your engine - then you need to work backwards to figured out what you changed that could be causing the problem. This is important in any type of troubleshooting. What did you move, unplug, change, forget , etc? If it is not accelerating even when you push directly down on the fuel injection pump lever - then it sounds like fuel starvation. I don't think it is the valves - more likely something you messed with when your removed the linkage and the valve cover. Could you have removed and improperly installed any vacuum lines or ALDA hoses?

Then there is the possibility that something else could have gone wrong with the engine just at the same time (by coincidence...??) Try to run the engine directly on diesel purge. This will bypass the fuel filter and fuel supplly from the tank.

Yeeehaw!! Problem solved!

I had switched the cruise and throttle rods-don't laugh, they fit! It gave me about 3/4" travel to the injector pump lever, with no experience, did not know that ~3" is normal. Thanks to all who gave suggestions.