gidpor:

Is your rough idle a steady shaking or just an occasional rumble? An occasional thump or shake still sounds like the idle valve or hoses -- if the idle valve sticks, then jumps, the idle will drop then surge, then steady -- all happens in less than a second. You may need to replace it, sometimes the motor is shot. Ditto for the hoses -- if they are loose, they will seat by suction, but can shake loose for a spit second once in a while, and you will get mixture fluctuations that can cause a miss. Usually doesn't affect starting since the cold start valve is in the hose at the intake, but causes hot running problems.

If the roughness is constant while sitting, it could be a leaking injector -- you will need to have someone check these. They will sometimes drip at idle rather than spray, and that cylinder will miss.

And check the front flex disk, too -- they go bad about every 60,000 miles and can make vibrations coming to a stop much worse, especially as the transmission downshift.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!