Peter Arnold wrote:

I think I have to ASSUME that the Speed Sensor is functional as the
idle actuator is trying to adjust the speed.  When I got home this
evening, I tried to adjust the "unassisted idle speed" per Marshall's
instructions.
Pull plug on actuator, engine stalls.
Hmm, I see adjustment screw, it has a 13mm jamn nut which has been
sealed to test my veracity.   Break the damn seal, full speed ahead.
Turn CCW, no improvement
Turn back and 1 turn CW, no improvement.
Seal it back up, time for Sam Adams!

Thoughts?

If adjusting the screw doesn't change the idle speed - then the injection pump is BROKEN. I don't recall how far I needed to adjust the screw before I detected any effect, but it was MUCH more than 1/8 or 1/4 a turn!

This link covers all the particulars:

http://mb.braingears.com/124_DISC1/Program/Engine/602_603/07.1-2053.pdf

Marshall
--
          Marshall Booth (who doesn't respond to unsigned questions)
      "der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D 2.0 159Kmi, '87 190D 2.5 turbo 234kmi
      Diesel Technical Advisor MBCA, member GWSection
    http://www.dhc.net/~pmhack/mercedes/mbooth1.htm


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