Hi guys, I was doing some fine tuning of the carb idle and mixture and noticed that the car ran better and smoother with the driver side vacuum port open to atmosphere vs hooked up to the nipple on the air cleaner.
This is all being done on a 72 dart custom with 225 all original engine compartment. It doesn't make sense to me?????

Any ideas?

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1972 Dart Custom

Your running way too rich if that is the case.

If the mixture screw is properly tuned, pulling the vacuum hose off provides a significant vacuum leak. My car will quit when you pull off the hose.....idle in neutral is at 750 rpm per the sticker on the fender. My mixture screw is about 2 turns with a #56 jet. Initial timing is set at 10 degrees.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

Thanks, I guess I just have to fiddle with the mixture some more.

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1972 Dart Custom