MC2100 Help- won't run

I moved to Colorado a while back, and am finally getting around to getting the carb rejetted and adjusted for the altitude. I had it running well in St. Louis, other than a bit of a bog transitioning from idle, but nothing excessive that kept me from being able to drive it. When I got to Colorado it still ran well at idle, but was way down on power. That was with #48 jets. Today I put #44 jets in (got a range of sizes to work with, that was just my starting point). No other changes. The car fired up and was running great for about a minute, when there was a pop or clunk- not a backfire, more like a metallic noise, I figured it was the high idle kicking down because the noise was accompanied by a drop in the rpms. Well, as soon as it dropped down it bogged down and died. And I haven't been able to get it running since. Holding down the throttle makes it at least fire while cranking, but not enough to catch, and if I'm all the way off the throttle, it won't even attempt to fire. Plus fuel is running out of the tubes that stick up just in front of the choke, so it's flooding.

I'm at a loss. I've never been great with carbs, and all the reading I can do online doesn't make up for having someone who knows their stuff walking through it with me. Thanks for any replies, and if anyone is in the Colorado Springs area and would be willing to actually come give me a hand I would be really grateful.

I'll check that next time. I didn't mess with it so it should be screwed in tight, how would it rupture? Do they just do that sometimes?

I did just decided to start fresh with the tune, double check float settings, reset mixture and idles. No change, still flooding, still only attempts to fire with the accelerator fully to the floor, even then it feels like I need just a little more for it to stay running.

Seems to me like the idle circuit is completely not functioning. Don't know why it wouldn't though.

    Move the distributor and see if it gets better, you'll need someone to crank it over or use a remote starter switch.

Honestly not sure on the engine miles, 120,000 at a minimum- the odometer wasn't working when I bought it. The carb has less than 1,000 miles on it.  Haven't checked the plugs, hadn't messed with timing. I'll put that on the list of things to look at.

What's more frustrating is the car is currently being stored at my in-law's, which is an hour from where I live, so I'm not going to be able to work on it all that often.


Edited by danleym - Apr/25/2014 at 10:14pm

makes me wonder about the timing chain.....since it made noise.........pull the plugs out and see what it does..if it cranks easy...maybe it hydrolocked?