When any car idles, it lowers the ignition energy (but not completely) to keep the car running. When it is cold outside, your Subaru's ignition energy is lost through heat because electricity also is measured through heat. When there is less ignition energy when it is already running on a lower ignition level, the car (your Subaru) is not likely to idle.
If an alternator is going bad it can cause a rough idle in a 1993 Subaru Legacy. Cold temperatures in the winter can also cause a rough idle in the Subaru Legacy.
your truck wont idle correctly when its cold, because its cold...and nothing runs correctly when it's cold. your truck wont idle correctly when its cold, because its cold...and nothing runs correctly when it's cold.
The Subaru engine could have a vacuum leak, bad head gasket, stuck choke, or several other things causing the problem. Any of these could give problems then ease up as the engine warms up.
cam angle sensor
how to adjust idle on 2001 legacy
turn the idle screw on the throttle body
Mine was doing that for a while. I took the Idle Air Control valve apart and cleaned it. Problem solved. Its normal for the engine to idle higher when its cold though. Once it warms up a bit the idle should settle down.
you cant there is an electronic throttle position sensor that controls idle may be bad
750rpm 850rpm w/Air Condition on
If you are having trouble with your Subaru, let us take a look. Visit us at our Subaru of Bend dealership in OR or contact us through our website.
my avenger does this when its cold out and it is becasue of the spark plugs need to be changed
P1507: Idle Control System Malfunction(Fail Safe). As per Subaru Trouble Code Info.