[V8] No Officer, I don't want to race

[Buchholz, Steven]

... read out the codes as soon as the failure recurs ... might as well
let the engine tell you what it is complaining about!

Steve B
San Jose, CA (USA)
> 
> I have been having some intermittent idle issues with the V8, where it
will
> rev from ~400-800 rpm in neutral (like at a stop light).  The ISV, O2
and
> knock sensors have been replaced.  This doesn't seem to affect
drivability
> or gas mileage, but this morning I was sitting next to a police car at
a
> light and the revving started up again (I have a Stebro so it is even
more
> noticeable).  I don't think it is related to the following, but
mentioned it
> just in case.  Sometimes it idles just fine.
> 
> Yesterday I drove it early in the day and it was fine.  A few hours
later I
> started it, the check engine light came on and it seemed to be in a
'limp
> home mode'.  I turned it off and back on and the condition didn't
change.  I
> got to the destination, parked for a few hours, turned the key and it
was
> fine.  No CEL, no rough running, no limp home mode.  This morning it
was
> fine (other than the revving thing which comes and goes).
> 
> Any thoughts?