Why not elevate the revs until what you think the miss is occurring at. Then loosen one injector nut at a time to see if you can pin it down to one cylinder?

I was sitting here and wondering if it could just be air in the fuel type of thing. If that were the case you would not be able to identify one cylinder as the culprit. Anyways fairly smooth at idle and loosing the smoothness just a little higher and then becoming normal again does not strike me as a usual type cylinder issue.


Also if it will not present the miss problem under no load critically check the transmission fluid level.

The first thing I tried was to loosen one injector nut at a time. All 5 make the engine stumble, which agrees with my compression numbers (all-300+). I have driven the car quite a lot since first feeling the miss, so I doubt there is still air in the fuel system. Driving the car feels exactly like the previous engine that definitely had a dead cylinder, but I am almost sure this one does not (compression numbers are consistent). I know it will be a lot of work to determine for sure, but I have this gut feeling that there is something wrong with the trans or torque converter (out of balance?). I have a rebuild-able 722.3XX trans, but I am not sure I want to go through the work and expense to change the trans, only to find out the original trans had no problem (still shifts great).
The miss is definitely there under load, at lower engine speed. once the turbo comes into play, the thing is smooth and powerful.

__________________

All Diesel Fleet
1985 R107 300SLD TURBODIESEL
2005 E320 CDI (daily)

LOTS of parts for sale!


EGR block kit
http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html

1985 CA emissions 617 owners- You Need This!
Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst.

Sanden Instalation Guide (post 11):
http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html