[DML] Re: Frustrated beyond belief (Lean Mixture / Rich Metering)

["content22207" <brobertson@xxxxxxxxxxxx>]

Welcome to the wonderful world of vacuum leaks. Because fuel/air
mixture is set while your engine is idling in the driveway (maximum
vacuum), leaks can lead to a false setting -- appears OK only because
of unmetered air. In fact it's too rich, which will show up at
throttle as manifold vacuum drops. That's why vacuum leaks are MPG
killers.

But I don't think this is Phil's problem. I'm leaning towards either
SEVERAL non-firing cylinders (I recently lost just one to a dead plug
wire, and performance was only minimally affected), or overall
retarded ignition due to either an improperly indexed timing scale or
failed advance inside the distributor.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, doctorDHD@xxxx wrote:
>  
> Does this statement make any sense?
> 
> I can  lean the mixture out to the point that the engine 
> starts to die and it's  still running rich.
>  
> Something is wrong with your rich  / lean assessment.
>  
> Can you explain what you mean?
> 
> 
> D² & 6530
> 









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