So you wish to have spark. When do you wish to have spark? The story I heard was that it must occur at just the right POSITION when the fuel air mixture has been squeezed to the max by the piston coming to the top of the cylinder.

Located in the bellhousing of the 103 motor is the crankshaft position sensor and its job is to tell the ignition controller where the crankshaft is and how fast it is moving.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician