[DML] Re: Engine Idle Cycles From 1000 To 500 rpms When Engine Warms Up
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[DML] Re: Engine Idle Cycles From 1000 To 500 rpms When Engine Warms Up



Very common to be a vacuum leak but anything that is unbalanced
between the cylinders can cause this. A mis-gapped spark plug, a bad
wire, dirty injectors, etc can also be the cause or contribute to the
problem. Not harmful, more annoying. A complete tune-up could make it
better if not fix it completely. When was the last time anything was
changed?
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, mike <cambpd@...> wrote:
>
> My engine idle is great when I first start up the car.
>  But once the engine has warmed up, the idle will
> begin to cycle down to 500 rpm and then back up to
> 1000 or so.  
> 
> Is this a vacuum leak problem or something else?
> 
> If it is a vacuum problem, can this harmful to the
> engine, i.e. valves, or just a nuisance?
> 
> Thanks,
> Mike #5781
> 
> 
> 
>      
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