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the wrong tdc is when cylinder #4 is at tdc on compression
#1 is the furthest back in the car on the left side
#4 is the furthest back in the car on the right side
an easy way to find tdc is to put a pressure/vacuum gage on #1 then rotate the crank by hand,
the crank rotates clockwise, when you get pressure on the gauge folowed by vacuum that is tdc compression
at tdc compression for #1 the rotor needs to point at the #1 wire in the distributor
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