[Shotimes] ok pit crew, yet another question

[Kurt Metros]

Gary,

Opposite the throttle body, next to the snakes on the drivers side of
the intake is a cylindrical part with an electrical connector on the
end.  This is called the IAB - Idle Air Bypass.  It allows the engine to
continue to get air when the throttle body is closed.  Obviously, when
your sitting at a stop the throttle plate is closed.  If the IAB is
dirty enough, it will not open and close properly, stopping air from
getting to the intake.  No air, no engine run.  It's also possible that
the airways that lead from the 'outside' of the throttle body plate back
to the IAB are clogged.  The IAB is easiest to remove if you undo the
electical connection, unscrew the top bolt, and then rotate the IAB
90-degrees (push the back of it down) and then you'll be able to get to
the bottom bolt.  The IAB is made up of two pieces that are screwed
together.  It's easier (IMHO) if you unscrew the two pieces to clean it
- it will lessen the chance of getting the electrical portion of it
dirty with cleaner.  Clean the IAB with carb cleaner - a Q-Tip might
help get in there too.  Not sure about the best way to clean the airways
as I've never had to clean mine out just to get the thing to idle....it
has been cleaned out when I cleaned the entire intake.  Clean the IAB
with Carb cleaner.

Hope it helps.  Others may have other considerations.

Kurt 'is it time to leave for the convention yet' Metros


>occasionally when coming to a stop the car will stall out. 
>sometimes it drops to 3 or 
>400 rpm then back to 1200 to 1400 then back to 3 or 400 rpm 
>and so on and so 
>on, sometimes it just shut down. this is with no air 
>conditioner running.