troubleshooting 350 motor

[terry19411]

i have a 350 chevy motor i have just replaced the cyl heads on --drove for 3 - 4 weeks -- just developed a "miss" so fire has been checked and cannot get every other cylinder to fire --------------have replaced the distributor, cap, rotor button and have fire on plugs but still misses on # 1,4, 6 and 7---- anyone got any ideas?:

 

[29Sedanman]

Have you checked your valves since you ran them when you assembled it?

 

[terry19411]

Have you checked your valves since you ran them when you assembled it?

No I have not but I will try that-- thanks 29sedanman

 

[larry_g]

The one thing that is common to that set of cylinders is the intake manifold. I believe those cylinders are fed by one side of the carb and the rest are on the other side. That said I would check that the carb is good, there is not a gasket leak under the carb, and maybe any vacuum porte that are tapped into that set of carb/manifold runners.

lg
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