Re: [Chrysler300] 300c

["Laurence G. Johnson" <laurence_g_johnson@xxxx>]

Here are some things to look at when the engine runs out of fuel idling. The 
root causes of this problem are - low fuel level in either or both carbs, - 
low intake manifold vacuum insufficient to support the idle circuits in the 
carbs.

- Plug a vacuum gage into the intake anywhere below the carb throttle
plates and read the vacuum level at idle with throttle plates closed.
If the vacuum is above approx 15 ins, move on. If low, look for an
intake vacuum leak at the cylinder head gaskets, or the carb base
gaskets, or in any of the attached vacuum hoses. If OK, suspect the
new camshaft. It could have too much duration or overlap which kills
intake vacuum. It could also be installed wrong, a couple of teeth
off will lower the vacuum too. If nothing here, move on the the
carbs.

- These old WCFB's have brass sight plugs on the driver side which can
be remover allowing you to observe the fuel levels in all 4 float
bowls. Take them out and look for low fuel levels in the carbs. The
fuel should just wet the threads at the bottom of the sight holes.
If not, reset the float levels accordingly. Check the needle/seat
assemblies to confirm that they are tight and haven't backed off
lowering the float level. Good luck..


> I just finished installing a rebuilt (original engine) in my C. The cam 
> was
> ground to original specs by iskenderian. Carbs are rebuilt (cleaned,new
> gasket and seats),and all ignition parts new. The car starts instantly, 
> but
> I can't get the idle low enough without stalling. It does run well at a 
> fast
> idle. It runs for about 5-10 sec and then simply can't get enough gas to
> idle. Touching the accelerator linkage gives it a little gas from the
> accelerator pump and it keeps running again for 5-10 seconds. When it is
> fully warmed up, It is better, but not good enough. Turning the bleeders 
> out
> doesn' t seem to help except I'm not sure how to do both carbs at the same
> time. Anyone have any ideas? The car idled well before the rebuild with 
> the
> same carbs. Does the overbore with the new cam cause a change in the low
> speed jets? I'm open for ideas Thanks Vince




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