Carburetor Heat Control on 28 Super Six

Unknown

To all Super Six Experts out there,

The following is copied from a forum on another site, so for those who have seen this before, please bear with me. Because of the input I've received on that site, I'm pretty confident that the problem is the heat control tube. But, by posting on this site as well, I might be able to get more input, maybe even as to where to get parts for the ol' 28:

I've recently inherited a 28 Hudson Murphy Bodied Landau Sedan.

My Father restored it about 30 years ago and it's run great all these years -up intil the day my dad died last year. We drove it in his funeral procession, then the next time we drove it, some four months later, it started acting up.

 

It acted like it was loading up, so I pulled the carb cover off and ran it to see if it was flooding, which it wasn't. Later, my Uncle, also a Hudson restorer and retired Service station owner, cleaned out the entire fuel system and checked the operation of the vacuum tank, etc. It seemed to run better, so they drove it to a local car show. On the way, it got so sensitive, that they had to keep the choke almost completely out and it would only go about 35 mph. This led us to believe it was now running lean. The car sat over the winter, then I played with it some more a couple of weeks ago, with the help of my uncle. When I got back at it, it wouldn't run unless I kept it at 1/3 throttle, and it ran really rough, as though flooding again. I pulled the carb cover again, no flooding evident, although all but the inner two spark plugs were wet.

I turned in the bottom fuel mixture wheel all the way, turned out the air adjustment almost all the way and it barely made any improvement. Where is the fuel coming from now? I would've thought it would've starved itself of fuel under this carb setting.

We checked out the carb, which is really clean (and simple), so we are starting to believe it might be the heat control pipe in the intake. Time didn't permit us to tear it down to check it, so I had to stop there.

What makes matters more difficult, is that the car is 100 miles away from where I live, so I thought I'd check this forum until I can get back up there to work on it again.

Can anyone help?