THE Dodge Dynasty Website
Rough idle
The 3.0 and 3.3 owners can have a rough idle when not enough air is getting
to the engine. This is most often due to either dirty airfilters, or dirty
TB's (throttle bodies). If that doesn't cure the problem, then often the
AIS needs to be slightly adjusted.
The AIS is basically an electric motor/valve which controls how open the
TB is during idle to allow for the engine to continue to run. The AIS basically
allows air into the engine by controling a small valve.
To clean the TB, the best thing to do is remove the throttle body and
spry it good with throttle body cleaner. Do NOT use carb cleaner- as I hear
that makes the idle even worse. Just follow the directions on the TB cleaner
and it should work quick and easy.
If your TB cleaner requires removing the TB, it maybe worth while to (ahead
of removal) go and get a replacement throttle body gasket (since usually
they can not be reused after TB removal).
