I still have not heard that you have gotten the engine to fire; back-fire or do anything with a prime or starting fluid. This leads to an initial electrical/ignition problem that needes to be traced down first. If you do much messing with the pump, it will probably need to be rebuilt by a speciality shop with the special tools and bench to set it up correctly.

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Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"