Thanks Steve!

I will pass this on -- I've suspected a sensor or wiring problem, too as the ignition timing is calculated. Very hard for it to be a mechanical failure other than incorrect resistance, etc.

Could the coding plug be bad?

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!