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SU Guru needed. B20 Lean Stumble 120-130

posted by  TR Conn on  Wed Mar 7 22:09 CST 2018
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last visit: Fri Oct 24 10:32 CST 2014
[RELATED]

I took the car out for a test drive today.
After changing out the entire ignition system (distributor, electronic instead of points, new coil, new ignition switch). It ran like a champ!
I'm confused here... If the ignition was crapping out, why was the engine running lean? Unburned fuel would show up as super rich wouldn't it?

I went with the ignition upgrade first since I had the parts lying around. I have a few needles to play with and can reshape them fairly accurately with a Dremel tool, wet/dry sandpaper and a micrometer. So that is where I'll go next.
I wonder if I can sneak a dyno into the garage without my wife noticing.

Thanks for the suggestions.

-TR






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