Hello, all. I've finally trailered my Benz back home and am ready to begin getting her back on the road. For an overview of the issue, please read http://www.peachparts.com/shopforum/showthread.php?t=196985.

I will undoubtedly need the assistance from the wise folk here.

The car: 1983 300SD, 265k on car, engine rebuilt at 196k - OM617, W126

The Problem: Will not start. Once fogged to run, runs great at 1500+ rpm, but at idle will stall.

The Symptoms: For 3 weeks prior to no start, vehicle would often hesitate and stall. The day of no start, idle would always stall. I changed secondary filter in parking lot of autozone, filling with Sea Foam, and car has not started on its own since.

So Far: I had it towed to a diesel tech who rebuilt and balanced injectors, replaced glow plugs, and replaced fuel delivery valves on IP. No change in starting ability. Diesel tech reports that IP does not appear to build enough pressure to pop injectors at starting/idle rpm.

Possible Cause?: I've run this car on a heated WVO blend (no more than 80% wvo) for the past 35k miles. Early in the summer, I ran out of oil and filled with diesel. Within 20 miles, these same symptoms - idle stall - cropped up. Topping off with WVO solved the problem. Does this indicate a timing issue, allowing the different (lower) cetane of wvo to run but not the higher cetane of diesel? Does this indicate wear in the IP that the higher viscosity wvo blend overcame?

I humbly ask for help from you experts. What do I do now?

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1983 300SD, Silver/Blue, 230+K (rebuilt at 196K)