Re: [Chrysler300] stumble

[Keith Boonstra <kboonstra@xxxxxxxxxxxx>]

I wonder if you had your carburetor rebuilt before the prevalence of 
ethanol. I had a terrific rebuild done a number of years back on my '58 
Chev carb, but then along came 10% ethanol and it ate the rubber parts 
in the carb - including the accelerator pump.  I had the same coughing, 
backfiring you are having.  The only solution was another rebuild - this 
time with the blue rubber parts (withstands ethanol attack) and now it 
runs great.  Check to see if you get a _strong_ squirt from the pump, 
and if you don't I'll bet that's your problem.

BTW if you're into the carb anyway, you might like to try going up a 
size on your main jets to compensate for the ethanol as well.  I did 
that on my '70 4-4-2 and the difference amazed me.  I swear it gave me 
at least another 50 hp.

Good Luck
Keith Boonstra
Holland, Michigan

-

bluesport62 wrote:
>  
>
> HI GANG. CAN ANYONE GIVE ME AN IDEA WHAT TO LOOK FOR. ON MY 62 SPORT 
> 383WHEN I PUNCH IT FROM A DEAD STOP IT BACKFIRES AND STUMBLES. I HAVE 
> DONE ALL THE NORMAL STUF. CARB WAS REBUILT BY AN EXPERT 40 YEARS IN 
> THE BUSINESS CHANGED PLUGS WIRES AND PLUGS HAVE MOPAR ELECTRICT 
> IGN.TIMEING IS SET AT 10 DEGREES.I KNOW IT SOUNDS EASY BUT I AM STUCK 
> ON THIS ONE.IS THERE ANYTHING I AM OVERLOOKING. 3000 MILES ON REBUILD. 
> THANKS . JOE LUCIANO HOWARD BEACH N.Y.
>
> 


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