rebuild the carb on the poncho today, put it on messed with the timming and adjusted the float and all the screws and such, finally got it idling ok, but it's running so damn rich it about made us sick. What did I not get right? I'm new to all the ****, and I can already tell carburators are gonna piss me off....
Adjust the idle mixture screws at the front on the base one at a time - in until it starts to sputter, then out about 1 1/2 to 2 turns. Repeat on the other one. Then set the idle with the throttle screw on the side.
that's where the mixture screws are already, and we already set the back one so it would idle. It idles better than it ever has, but the gas fumes are ****ing aweful.
it's open as far as it can go, my buddy broke the fitting on the automatic choke putting the carb back on, so i'm gonna have to put a manual choke in I guess. But it's definately open.
Try turning the mixture screws in a little at a time and see if it helps. (1/4 turn at a time). Also give the garage, if you're in one, time to clear the fumes before adjusting further.
I'm out of the shop until 8 in the morning. We ended up opening both doors so we would keel over. I planned on playing with the screws more tomorrow, I just wondered if there was something else I needed to check, I guess the float could need more adjusting to?
It's possible that the overflow, which drains into the venturi, could be dumping fuel if the floats are too high.
You might want to check at the bottom of the accelerator pump chamber.There should be a check ball in there.If that was left out(easy to do)it will cause an extremely overrich running condition. When you backed off the throttle sdjuster was it completely off the stop?Best way I've found is to run the screw back until you see daylight between the screw end and the lever.Then run it down until it just contacts the stop.Make sure that check valve is in there first.
The ball is in there, i replaced both of them, all the gaskets, the accelerator pump, and a couple of other things I dunno what you call them. I also cleaned the **** out of it, whole can of carb cleaner went on it. The ilde adjustement was played with until we got a good idle out of it, which took awhile, but i'm pretty sure it's good. We had a real mechanic in the shop for awhile and he helped get it idling good, but he had to take off so had no help figuring out this problem.
If turning the mixture adjusting screws in all the way in causes the engine to stumble, then it's probably just the screws needing adjustment in. If you can see fuel at the angled tube in the top, then reset the floats.
Did you replace the floats? Prolly not, as they cost extra and don't come with the standard rebuild kit. Floats can turn into "sinks." And a ****load of gas goes down the overflows into the engine. I've stared at a carb on a running engine, and for some reason, I couldn't even see it happening. I had no ****ing clue what was going on, I thought for sure Satan had posessed the soul of my Cadillac, until Rocky advised me to tear my carb apart and throw the floats into some water to see if they sank, and sure enough, one did. That rochester is a pretty simple carb, so either something is horribly ****ed up with it, or the floats sank, or something is holding the needles outta their seats. Usually the main problems with those are vacuum leaks around the rod that holds the ****erflies... and when some jabroni strips the threads on the top casting where the fuel line and filter go in... good luck, that **** is aggrivating as hell... -J
[ QUOTE ] That rochester is a pretty simple carb. Usually the main problems with those are vacuum leaks around the rod that holds the ****erflies... -J [/ QUOTE ] I had forgotten about that problem and that happened on my 55.The throttle shafts had worn the carb body to the point that they wobbled when you tried to move them side to side.There is a company that will install bushings in there but it is expensive.I wound up getting a newer 2GC and using the bottom section.Most will interchange but match them up first(if that is in fact the problem).Good luck!
good post, I have the same problem too rich on a 2GC. but runs and idles fine... unless you punch it from idle then it stumbles hard. Yes, the acclerator pump is working. I'll have to try the float to see if it sinks, good idea there. My mixing valves are 3/4 out.
After you make sure float is ok, check float level, then make sure that the little wire retainer thing that attaches to the needle to the tang on the float is not causing the needle to not completely seat. Years ago had that problem. I used to throw them away back when I used to do a lot of 2GCs. Also if you removed the jets when you rebuilt carb make sure they are in tight. Good luck!
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