Subaru Outback Chugging Along... Need Help!

subaru
engines
gasoline
filters
oil
outback

#1

Howdy,



I have a 2001 Subaru Outback 2.5 Limited Sedan. The Check Engine light is intermittently going off and on. I think this may have to do with a fuel line problem. I recently moved to a new place and started buying Unleaded Gas from the nearest Gas Station. The Subaru started to have problems going up steep hills. When I accelerate the car just can’t keep up, the odometer starts dropping off and my car has actually stalled out once. When I restart the engine, the car feels fine most times. This doesn’t feel like a transmission problem, but a fuel sensor or possibly fuel filter. It feels as if the engines is not getting enough fuel. On the highways, the Subaru seems to perform fine.



So, I visited another Gas Station and filled up with Mid Grade Unleaded. This seems to fix the problem, except the Check Engine light still appears every once in awhile. I have found that when I fill up with the Unleaded gas from the original gas station, I see the same problems again.



Is the fuel filter most likely in need of replacement and how much should this run me?


#2

I’ve always fed my “fleet” of Subarus (6 so far) mid-grade fuel. If you moved to to a higher altitude, you may to check that your manifold absolute pressure sensor is working correctly. If the port that samples ambient air pressure is blocked, the fuel-air mixture will be off.
On our Outback, I get a check-engine light and the OBD2 code reader tells me it is due to low catalytic efficiency. I can reset it but it comes back a few days later. Get yourself an OBD2 code reader (around $100). Good luck!