The EGR may not be able to close if it is clogged, i.e., stuck open
because carbon deposits are holding it open. That's what happened on
my '96 SL2.

Ken

"Van&Joan Hada" > wrote in message
...
> Hmmm, I thought an EGR valve was closed at idle. A clogged EGR
should then
> not be noticeable until acceleration. In fact the way I test my EGR
is to
> take it off and cover the two holes with duct tape and temporarily
reinstall
> it. then idle it see if there's any change.
> Van
>
> "Joe" > wrote in message
> ...
> > We have a winner. It was a clogged EGR valve.
> >
> > Thanks,
> > Joe
> >
> > "B. Peg" > wrote in message
> > ...
> > > EGR valve.
> > >
> > > B~
> > >
> > >
> >
> >
>
>