Engine misfiring and stumbling

[Leecbr]

I'll start with the distributor rotor/dist cap due to the the carbon tracking. That's why I love this website and the knowledge pool available. Thanks for all of the great advice guys...

I was wondering if the carb could have something like scaling or debree clogging one of the jets causing it to run lean. I'll start at the distributor and then work towards the carb ( power valve ).


Lee

[Gaz64]

Originally Posted by Leecbr

I'll start with the distributor rotor/dist cap due to the the carbon tracking. That's why I love this website and the knowledge pool available. Thanks for all of the great advice guys...

I was wondering if the carb could have something like scaling or debree clogging one of the jets causing it to run lean. I'll start at the distributor and then work towards the carb ( power valve ).


Lee

If you don't drive it often, the carb could have water corrosion inside it.

By the sound of it, you have multiple little problems.

[jhv48]

Generally, carburetor problems will not show up in only a couple of cylinders, unless you have a single plane intake manifold.

Stick with the cap replacement and then we'll go from there if that doesn't cure the problem.

[winnipaw]

Did you happen to mention if the plugs were fouled with carbon? Does the car idle OK? Choke mechanism? How about considering fuel pressure. Do you have a pressure regulator? What is your fuel pressure reading? When the car is turned off, is there any fuel visible in the venturi or throttle plate. I'm chasing all these issues at the present time, after rebuilding my Holley 2160. I've done this many times and its never a cut and dry fix. Everyone here has given good ideas. Trial and error will get results eventually.