In article <Ke0Oa.3068$%71.107753 (AT) news20 (DOT) bellglobal.com>,
ZZdougwi (AT) sympatico (DOT) caZZ by dw dropped his wrench, scratched his head and
mumbled,
before idle quality can be improved. Check the injector seals, the o-ring
seal for the intake manifold, the seal at the back of the manifold for
the cold start injector pipe, the seal for the idle air bypass pipe, the
vacuum lines under the manifold for splits, the gaskets and o-ring seals
for the double U pipe on the front of the manifold, the bellows between
the air metering plate assembly and the U pipe (if it's a later model),
vacuum leaks around the fuel distributor and the mixture adjustment plug.
Once all these are proved to be sealed then you can adjust the two
balance screws and the idle air adjustment. The chances of your 23 year
old motor being vacuum leak free are zero. You'll have to address these
issues first.

Bob
--
The goal of driving is to miss the maximum possible number of objects.