Hi !
For sometime the cylinder#6 is missing. I just found out this morning that when engine is cold, With the choke on, I remove the spark plug wire and it is missing. Put it back and it run fine. All other cylinder does the same.
May sound funny to write this but when the engine is hot if I unplug cylinder#6 it makes no differnence. And all other cylinders misses when I unplug spark plug wire.
I made a compression test all cylinder tested 155-160, but #6 read 170, wire are good , spark plug are good.
Anybody could help?

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Try adjusting the exhaust valve on that cylinder.

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Yeah....Im the one who destroyed this rare, vintage automobile.....

You were right, I reajusted the valve with the engine running, and the exhaust valve was a bit lousse, witch cause that cylindre to have higher compression and to run ok when cold.

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