With everything set @ 0*, and verified with the bypass unplugged @ timing marks w/ timing light you should read 0*.
When bypass plugged back in, you should read the timing value that matched the idle cell(s) in your timing table @ marks w/ timing light.
Keep in mind 7427 has the dynamic timing feature enabled so @ idle it will adjust/bounce around a few degrees.
So if your timing table has say 26* @ idle that's what you should see w/ the timing light @ idle.
Or if you rev & hold to 1500rpm your timing light should read the matching value(rpm/map) from the timing table.
If it is not, something is wrong.
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