[Chrysler300] 300F -- "Stumbles" On Takeoff

["Michael Reed" <mrreed@xxxxxxxxxxxxxx>]

Before I had the carburetors rebuilt this spring, the F "stumbled" on 
takeoff from a dead stop (engine idling), like as if the accelerator 
pumps were not functioning correctly. After a two-second "stumble" the 
engine takes off and runs/accelerates normally. Depressing the 
accelerator while driving at any steady speed does not result in the 
stumble. It appears to occur only from idle.

During the rebuild, the accelerator pumps were replaced. The rebuild 
fixed a couple of other carburetor problems, but the stumbling is not 
a any better.

I noticed the accelerator pump setting (27/64" from top of pump shaft 
to the top of the air horn) is a bit low for one carb, and quite a bit 
low for the other (3/32" maybe). I wouldn't think this would be the 
cause of the stumble, but... I'm not sure. It sure acts like the 
engine isn't bebeing enriched on inital acceleration from idle.

Anyone experienced this situation? Cure... Ideas...

Mike in sweltering Lake Odessa, Michigan




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