Mike Behnke wrote:

> One thing everybody here has missed, and is common with the 3.5L. The
> intake manifold gasket develops a leak, (around cyl 5 IIRC) which causes
> loss of vacuum, rough idle and sets the CEL. The ingition
> ON-OFF-ON-OFF-ON sequence will most likely reveal error code 43.
>


Good point- I tend to forget that one because my wife's car never did
that in 215,000 miles. I did replace the lower intake gaskets at
210,000, but it was because they were weeping coolant, not causing a
vacuum leak. They were JUST about to start leaking at #4 port, though.
#5 wasn't far behind.