I have the same problem with my '94 Civic. The colder it is the lower
the idle speed (after warm-up that is). I don't know of a real fix, but
turning on the headlights seems to bump up the idle enough to make the
car drivable. There is an ELD (Electric Load Detector) in the under-hood
fuse box and when the ELD signals the ECM that the current draw is over
a certain threshold the ECM bumps up the idle speed by about 100 RPM.


Sam Cormier wrote:
>
> Hi guys I have a 99 Civic and in the winter only it will idle
> really low after driving for over 10 minutes. When I stop at
> a red light it even stalled 3 times last winter. It never happens
> in the summer though... only in the winter. I sprayed the plugs
> and cap with water like someone told me right when I start it
> but it didn't make it idle low... only after the car warms up it seems
> to happen.
>
> Then if it stalls or I shut it off... then turn it back on... it's fine...
> for
> another little while.
>
> Please fix my car =)