Originally Posted by ScubyPhilly
Does it idle constantly at 500RPM or does it fluctuate? Are there any recent changes? How many miles on the vehicle? What are you using to measure idle?
It fluctuates, but it couldn't be more than between 450 and 550RPM. This is according to the tach but I had a cheap OBDII adapter on before and it said roughly the same (+/- 50-100 maybe). No recent changes. IIRC it's always done this, but I can't remember anything really. ~4500 miles. It also has a weird rumble when it's idle, it doesn't sound bad but it doesn't sound normal. I just ordered another OBDII adapter so, assuming it works, I can update Monday night to confirm that it's actually ~500RPM.
Another thing is I looked this up and people don't seem to think much of it, as if it's a subaru thing. What do you think?