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87300SDL,
I would bet you have a Turbo problem. It sounds as if your wastegate is dumping boost. However this doesn't explain why it stalls and will not restart immediately. It may have to do with too much fuel in the combustion chambers. Dave M., "GSXR" is very experienced with the OM 603 engine. He might be able to shed more light on this. My truck, a 94 Chevy 6.5L TD w/ 175K miles, was doing the same thing, but not stalling. It turned out some evil critter chewed a hole in the vacuum line that controls the wastegate. Until I replaced the line, some duct tape worked fine - and a mouse trap took care of the critter.
I do know that you do not need to adjust the valves. I'm not sure that is a possibility on a OM 60X engine.
I would start off with checking out your wastegate system, then the ALDA boost system. Hope this helps.
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D. Blake
86 300SDL 340K (for sale)
83 300SD 205K (gone)
06 Chevy K3500 LBZ CCLB 50K
94 Chevy K2500 6.5L TD 250K (gone)
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