Suggestions:

0.- Diagnose thru terminal 3 of module control (Duty Cycle)
1.- Check the fuel pressure regulator
2.- Check the EHA
3.- Microswitch
4.- Ignition Coil (also the wire)
5.- Cap & Rotor

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1999 Porsche 996 Carrera Convertible
1994 420E - SOLD
1986 300E - SOLD, what a car
609 Certified