rough idle on cold start
on cold starts, our forester has a weird (to me) idle characteristic. immediately after start-up, for 10 seconds or more, the rpms jump all over the place. i mean, idle goes way up, then immediately drops way down, then somewhere in between, then way back up, etc.
i dont recall actually seeing the rpms on the tac, but just the sound and feel. i will have to confirm with numbers when i get the chance - i gotta think about checking this in early AM, at a time when i am usually not yet thinking clearly. but i thought i would post up here and see if anyone else is experiencing this too. is it common? could it be that it's just a matter of oil pressure coming up and the engine getting its first lube of the day? why is it so erratic versus just staying high?
i dont get this behavior from my toyota trucks, so its got me mildly concerned. any feedback is greatly appreciated, i dont want a bad situation getting away from me if i can help it. -thnx
driving a 2007 2.5 X Premium