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Discussion Starter #1
I sure appreciate all of the help I have gotten from the people on this forum. We are going up to 60 this week and it is time to cruise.

I put a rebuild kit in the autolite 2100 on my 66 and everything went mostly okay, I had a vacuum leak but it is fixed. Now I am trying to get it set up right.

I don't know how to adjust the idle mixture. They are set to 1.5 turns and the engine runs pretty good except that sometimes I get a stumble just above idle. The problem seems to come and go, sometimes it just flames out altogether. I haven't hooked up a vacuum gauge to it yet but the old ear tells me it is good and the idle speed seems steady.

I feel that the problem is in the carb because before the rebuild the throttle response was pretty snappy without any dead spots. Any tuning tips would be greatly appreciated.

Also, there is an arm on my throttle linkage that pulls a cable connected to the tranny (c4). Is this the kickdown? On mine fully pulling back the throttle linkage almost takes up all of the slack in the short cable connected to the lever. I guess the cable should pull the lever somewhere in the middle of the linkage travel. At what point in the travel of the linkage should the kickdown engage? I had noticed that the car never downshifts when you put your foot in it, I guess this is why.

Thanks in advance.

66 Coupe
C Code
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The carb sounds like the pump shot not functioning properly. Looking into the top of the carb, do you see 2 steady, and fairly heavy streams of gas shooting into the barrels when you pull the throttle all the way open (do it with engine off). Camachinist has a great picture of what it should look like ... maybe he'll pipe up with the URL.

On the kick down, yes, the cable going from the throttle arm to the tranny is the kickdown. It should be adjusted to where at full throttle, it pulls the kickdown lever on the tranny to it's fullest length of travel. If you have it adjusted too tight, you won't ever be able to get full throttle, as the kickdown cable will limit the travel of the thottle linkage ... too loose, and like you've already noticed, it will never pull the kickdown lever, and the tranny will never kick down.

HTH.


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I agree with Johnpro, Check the Accel Pump, Make sure you have it on the correct hole in the lingage so it shoots the right amount of fuel. If my memory is correct it should be on the second from the top, but double check I could be wrong

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Discussion Starter #4
I get a pretty healthy squirt and I put the linkage back where it came off. I probably could use a tune up also, but I want to get the car back where it was before I started.

Any ideas on the best way to adjust idle mixture? Am I going to need a vacuum gauge?

66 Coupe
C Code
http://bio.wayne.edu/dave/st51.jpg
 
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I just rebuilt a 2100. It was my first time. The shop manual describes how to adjust the idle mixture. I'll describe what I did.

The 1.5 turns is just a base adjustment to get the car running. I backed off each screw 1/4 turn at a time, alternating between screws. The RPMs should increase. Keep turning the screws out 1/4 at a time, alternating screws, until the RPMs begin to go down. Then turn them back to the max RPM setting.

I had to lower the idle with the screw as it went off my guage at least once. My car now runs better than ever.

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