I have tried to move my electronic distributor 1 tooth as I am only able to catch one side of the hold down clamp and still not able to fully advance to the proper alignment to the drill hole. I am short ny about 1/2”. My flywheel has two holes drilled, one slightly larger than the other. I am assuming one is TDC and the other the advanced mark. When I set to the TDC the engine is difficult to start, backfires, and floods out and stalls as the engine warms or under load. If i just move the gear then try to move the body the distributor will not go down all the way. What am I doing wrong?? I am afraid if I move them both at the same time I will oose my reference ( small mark on the body rim for the rotor) for my base timing. Any suggestions?
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John - Q engines, as you saw, have 2 dimples on the flywheel. One mark is used on engines with right hand rotation and the other mark is used on left hand rotation engines. Both indicate the advance position (10 degrees on my engines), not TDC. It’s possible you’re trying to time a RH engine using the LH mark. Or vice versa. If you look closely you should see a R or L stamped next to each dimple. I’d try that first.
You will need to get a long straight slot screw driver and rotate the oil pump drive that connects to the bottom of the distributor, then try again. What I have also done is take an old cap and drill a hole at #1 and can get the timing close. If the crab cap is lined up straight and the rotor is hitting #1 on the cap you should be real close. I have a race car guy to fine tune mine after I get it close. If the crab cap is on an angle, you are a tooth off.