cyl #3 not working

[Boatdog]

I am baffled by this one. Please help.

1975 engine with compression numbers of between 155 and 160 all the way around. There is good fuel delivery and spark to cylinder #3, but it refuses to fire. All other cylinders are working fine.

My "is it working" test is to pull the plug wire off the plug and listen for a change in engine rpm/performance.

Here is what I have done to try and fix this.

Whenever I pull the plug after each of these changes, the plug is always wet with fuel.

- New plug ... no change.
- New plug wire ... no change.
- New injector ... no change.
- New points ... no change.
- New cap, rotor, and coil ... no change.
- Installed known working CD box ... no change.
- Spray pattern and volume from injector #1, #2, and #3 are all the same.
- Put #3 plug wire on #2 and ran temp wire to #3 ... no change.
- Switched CIS feed line from #2 to #3 at injector ... no change.
- Switched CIS feed line location at distribution head from #2 to #3 ... no change.
- Compression test while running and not running on #2 and #3 give same numbers.
- Put a timing light on #3 wire while running engine and get consistent light flickering.

What am I missing? What have I not done that I should? It seems that #3 just does not want to fire.

[Lapkritis]

Worn cam lobe not opening a valve.