I always prime one of the carbs when starting the car after long (weeks or more) storage.
Saves much wear & tear on the starter
From: 'Dan300f' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Thursday, February 17, 2022 9:49 AM
To: dplotkin@xxxxxxxxxxxxxxxxxxx; rhuss214192@xxxxxxxxxxx
Cc: chrysler-300-club-international@xxxxxxxxxxxxxxxx
Subject: Re: {Chrysler 300} Cold start 300G
Several years ago, I was having a problem with my F shooting soot immediately after starting from a cold engine. I resolved the problem by turning the idle mixture screws in 1/4 turn. Take a look see at the attached photos of before and after the adjustment. The after adjustment photo (clean floor) was taken 24 hours after the before photo (dirty floor) was taken. I don't know if these adjustments had anything to do with it but after the adjustments, I drove the car to the Meet north of San Francisco and back home, about 1,000 miles total, and my overall trip mileage had improved by about 20% from 10.5 mpg to 12.5 mpg. I had never gotten more than 10.5 mpg in all my travels to places like Phoenix, Sacramento, Denver, etc.
As to cold starting of my F, I turn on the electric fuel pump for a few seconds and the car starts off right now. Otherwise, it's pump, pump pump. Also, I found out that first putting the car in Drive and then pushing the Reverse button, I do not get a sudden jolting shift and a screech from the rear wheels.
On that trip to San Francisco, on the way home via Route 5, I was passed by a caravan of about 50 Corvettes. Nearly everyone of them gave me a thumbs up. Wonder what their reaction would have been if they were passing 50 300's???
Just some random thoughts.
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Richard-
The shop manual and the F supplement contain exact instructions for setting up the carbs and linkage on an F or G. If you have had them off the car than you should start at the beginning and follow the instructions to the letter. Nothing has changed in 61 years to render the instructions written for Chrysler techs inapplicable today. Its the same car and we should be doing the same things!
Sooty exhaust is an overly rich choke setting depending upon how much soot. If the car doesn't make it out to the road for high speed runs expect sooty exhaust. Two carbs feed a lot of gas into that 413, it won't be happy loafing around town.
Pull the plugs and read them. That will tell you something about your carb adjustments. then follow Mother Mopar's procedures.
Danny Plotkin
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