Today I assembled oxygen sensor in my super six. It was very easy to do. I drilled hole to the exhaust pipe right after exhaust manifold and weld piece of iron with correct screw thread. Oxygen sensor is one wire type. After that it was very easy to adjust fuel mixture. You only need digital volt meter which can read millivolts.

My carburator is Carter 2bbd and i had problems with correct cruise mixture and bad MPGs. Today When I started adjusting, the carburator was set in factory settings. With these settings the mixture was too lean, I lift metering rods little and after that mix was much better. At this forum somebody told that he has lift metering rods 1/8" but for me that is much too much.

But why I write this, is that I have been fighting long time with my carburator. I have clogged every vacuum pipes which are not so important to make sure that there is no vacuum leaks. I have also clogged the EGR with blind plate. rebuilt the carburator..... But Nothing has helped. The engine has not worked as smooth as it should. Now I know that adjusting metering rods or mixture screws, very small change has big effect.

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Sorry, my english is not very good

Having good data feedback system to guide your work is the way to go. Takes some of the guess work out and shows you what works and what doesn't. In the long run, it saves you money.

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Cheers!
Al T

Check / adjust the valve lash and double check the ignition system.
There could be some other issues causing the poor performance.
DD

Yes, I'm going to do that valve lash adjustment tomorrow. Now when I know that they are adjustable. Ignition system is ok and I have checked there everything. Maybe I'll have to repair carburators throttle axle clearance also.

There is also some work still with choke. Chokes pull off valve is leakin and I'm gonna get new one propably tomorrow.

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Sorry, my english is not very good

Your English is OK, A lot better than my Finnic!
Bob D

The language is FINNISH

Merriam Webster's Collegiate Dictionary defines a Finn as "a member of a people speaking Finnish or a Finnic Language.
Bob D

This may be Mr Webster's thots but do the Fins recognize this North American guy as an authority on their language?

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Cheers!
Al T

Maybe Joe Webster isn't Finnish and doesn't speak a Finnic language but what about Joug Merriam?!!
Bob D

Nobody of my friends have never heard word "finnic". And Everybody here speaks finnish-language. I think that Merriam is wrong. But I don't mind. My slant is the problem, not one word.

Now I have adjusted valve lash. Intakes were little loose, and exhausts little tight. I don't know if this is normal but this is how they were. Adjusting valve lash helped little, but there is still problems. I mention before that I installed Oxygen sensor and It is possible to see current mixture all the time. The mixture is changing all the time at idle speed. And at cruise its after 10 minutes drive getting lean. Choke is off much before and its not the reason. I also think that metering rods are stuckin and worn-out. Carburators Rebuilt kit didn't contain the metering rods and mixture screws and i don't know where I can get new ones. There Is also too much clearence in throttle axle and also in meterin rods axle ( or what is the correct name). I will repair them as soon as it's possible.

If anyone has idea what else than choke makes mixture lean after short drive I would like to know.

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Sorry, my english is not very good

I understand your English a helluva lot better, than I do 'ebonics'.

My first guess for your problem is a vacuum leak problem. My second guess is possible fuel delivery problem. Or, maybe it's a combination of problems.
Search threads here for tips for checking fuel lines, hoses, and tank.
What kind of vacuum are you running at curb idle, in in. HG(please, no metrics)?

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'66 Cuda 225/4spd
'66 Dart GT convertible 225/auto
'64 Dart GT 340/4spd

Let's see.......correct me if I'm wrong, guys, but in his first post, he said he's got a Carter 2brl. Now his latest post says there's too much clearance in the throttle "axle". I seem to recall the Carter BBD having a problem like that, don't I? Maybe I'm confusing carbs, but this would give him a vac leak, couple with a sloppy metering shaft, I would suggest those are his major contributing factors. It may be much more beneficial for him to hunt up a rebuildable core and start over.

Roger

You are right, the BBD has a common problem with a worn throttle shaft (axle). These can be rebushed with some machine work, or you can get another carb. The Holley 2280 is supposed to be a bolt-on replacement that may be better too.

Lou

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Home of Slant6-powered fun machines since 1988

That is problem what I know and what will be under work as soon as it's possible. I'm gonna get both axles rebushed and I really hope that it will help. The work is not difficult but finding time for that is very much difficult, because I don't have another car at this moment.

And the curb idle vacuum is ~450 mm/hg (17,7 in/hg)

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Sorry, my english is not very good

Relax about your English, Joug. You were raised as a child speaking Finnish, and English is a second language to you. We Americans might be a bit arrogant about some things, but we are able to be civil, especially here on this forum.

Does that curb idle vacuum give you a steady reading, or does it jump around? Also, what year is this engine?

Roger