Re: 383 running rough?

[Doug Daniel <dougdaniel50@xxxxxxxxx>]

most of the problem is the new gas it is lead free and made of ethenol or a precentage of ,,,not enough octain   and our cars will not run well with it ,,,

--- On Wed, 12/16/09, Dan McCormack <mcwheels@xxxxxxxxxxxxxx> wrote:

> From: Dan McCormack <mcwheels@xxxxxxxxxxxxxx>
> Subject: Re: 383 running rough?
> To: 1962to1965mopars@xxxxxxxxxx
> Date: Wednesday, December 16, 2009, 8:55 AM
> 
> Jim, You say it's cold and I wonder if your not
> experiencing carburetor icing. This was a problem even when
> these cars were new especially in cold damp weather. The
> damp air rushing down the carb will actually form ice
> crystals in the carb and make it idle and run rough. Next
> time try restarting the car after sitting about 5 minutes
> and the engine has time to heat soak. If it clears up I'll
> bet that's your problem. You'll note in later years Mopar
> started using air cleaners that sucked in warm air from the
> exhaust manifolds during warm up to help with this problem.
> Another thing that will help is adding a can of dry gas to
> the tank. We get so used to today's cars with fuel injection
> we forget about all the winter problems of starting and
> warming up a car in the old days.
> 
> Dan
> 
> 
> 
> ----- Original Message ----- From: "Gary H." <spigot2039@xxxxxxxxxxx>
> To: "1962to1965mopars" <1962to1965mopars@xxxxxxxxxx>
> Sent: Tuesday, December 15, 2009 5:12 PM
> Subject: Re: 383 running rough?
> 
> 
> 
> Thanks Steve.
> 
> My carb is a 1965 Carter AFB 3858S.  Do you have spec
> info on that?
> 
> Again, I'm no expert.  But I'd have thought anything
> choke related
> would clear up after the choke opens all the way.  The
> first time I
> ran it, it cleared up after 10 minutes; I think long after
> the choke
> would have opened full.  The second time after
> starting cold, it ran
> rough for 5 minutes before I shut it down.
> 
> I'll try again tonight since it's a little warmer and I'll
> pay closer
> attention to the choke.
> 
> Maybe it's too rich to start with?  Is there anything
> other than the
> choke that could cause it to 'miss', and then get better as
> it gets
> warmer?
> 
> - Jim
> Jim Altemose, Long Island, NY
> 
> 
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> 
>