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

[Andy Schor]

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?

Andy Schor
'91 V8QM
'91 Avant 



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