Another No-Start

If the car idles better with gas off then there are two possible problems. Either the gas level in the carburetor is too high or the idle mixture adjustment is off, likely too rich.

You can get a tool that lets you see the gas level in the carburetor with the engine running or not. With the Zenith carburetor, the idle mixture jet controls the amount of air mixed in with the fuel. Screw it out and more air and leaner mixture. Did you try to adjust the idle mixture screw?

Here is a site that will help you figure out what is wrong: https://modela.org/symptoms.html
 
Last edited:
nkaminar said:
If the car idles better with gas off then there are two possible problems. Either the gas level in the carburetor is too high or the idle mixture adjustment is off, likely too rich.

You can get a tool that lets you see the gas level in the carburetor with the engine running or not. With the Zenith carburetor, the idle mixture jet controls the amount of air mixed in with the fuel. Screw it out and more air and leaner mixture. Did you try to adjust the idle mixture screw?
Click to expand...

I have not tried the idle screw, only because I have never messed with it before, but the mixture is definitely too rich. Plenty of smog coming from the tail pipe when running.
 
Problem solved!

Everything seems to be fine now. Turns out my GAV got stuck open about 2-1/2 turns. When turning it before, it felt all the way seated and wouldn't budge anymore to the right. Gave it a little twist this morning and just kept turning and turning until idle was back to normal.

Thanks to everyone for their input
 
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