Cylinder 3 spitting?

[kennyb01]

Hey guys, story is I rebuilt the block because oil was getting past the rings and had a bit of blow by. The engine ran fine before that. It's a 16 valve with weber 45 dcoe carbs. I set timing, wired up the msd, and started it up for the initial break in. But for some reason cylinder 3 spits periodically and inconsistently out of the velocity stack. The only thing I replaced in the carb is the valve for the floats (it was stuck shut and wouldn't fill the bowl) I replaced the gasket on that top plate since it leaked fuel. I haven't touched the idle air screws only adjusted idle. Any ideas as to why it would be doing this? Ps. Carbs were obviously tuned prior to teardown.

[allencr]

What's the compression?

Ps. Carbs were obviously tuned prior to teardown.

I don't know what that means, probably that the jetting is OK, but they have to be synchronized and their idle mixture has to be adjusted, there are no options.

[yoshimitsuspeed]

Is there any possible way you have a sticking valve or maybe a tight shim? I can't think of too many reasons why it would do what you describe but a leak on the compression stroke blowing air back out the intake seems about as logical as anything.

[kennyb01]

Thanks guys, things I've considered but wanted a second opinion. I was really hoping I could cheat and not have to re-tune the carbs. Lol I'll double check compression and for a sticky valve as well.