Re: filthy rich

[Steve Bradley <scscomp@atl.mindspring.com>]

Melissa & Jim wrote:
> 
> On 30 Oct 97, Steve Bradley wrote:
> 
> > Can anybody tell me what is special about cylinders 2 and 4 in a '71
> > FI SB?
> >
> > When I pull my plugs, the electrodes on the ones on cylinders 1 and
> > 3 are brown (which is normal, I assume) and the area directly
> > adjacent to the thread, facing the combustion chamber is fluffy
> > black (not normal, I assume).
> >
> > The plugs on cylinders 2 and 4 are totally carbon fouled, fluffy
> > black on every part of the plug exposed to the combustion chamber.
> >
> > Does the CU or some other component send more gas to cylinders 2 and
> > 4 for some reason?
> 
> There should be nothing special about 2 and 4.  This is pretty
> strange.  The 71s are just about the best year.
> 
> Things to try/consider:
> 
> Check your compression all around.
> 
> Check your charging system voltage.
> 
> Check the timing and the valve adjustment.
> 
> How's your gas mileage?
> 

Gas mileage is 20-21 in town (unknown on the road). Would low
compression cause said symptoms? Timing and valves are OK.

Steve B.