"My
car is a 1992 240sx. When I drive and come to a stop sign, the
car's RPM sometimes drop below 500 RPM and stall out. Does anyone have this problem? Sometimes it doesn't stall out but the RPM still drops down to 200 or
300 RPM then goes back to 700 RPM. Any help in regards to this would be greatly appreciated."
"Most 240sx's eventually have an problem idling. This is related to the IAA valve which control the air mixture during idle. The
two options to fix this are to have a dealer adjust the valve or simply have it replaced.
The symptoms are clear: as you hit the clutch or lay off the
gas and the
car begins to slow and idle the RPMs
may drop (sometimes quite rapidly) to extremely low levels, sometimes actually stalling completely. If this is happening have someone check out your IAA valve and you
may wish to clean all the ground wire connections for the
car's ignition and injection system."