[Extreme cold transmission noise under load]

Thanks for the response!

 

Seems to match engine speed more than road speed, so it could be something related to the input shaft of the transmission. The most noise seems to be between 1500 and 3000 rpms. It might even stop at higher rpms above 3000. Very dependent on engine load. If I accelerate slowly, it doens't seems as bad as if I work the engine.

[Extreme cold transmission noise under load]

Hello All,

I'm experiencing some noise from my manual transmission (i think) during
the recent cold snap in northern Vermont. The car is a 09' with 100,000
miles on it.The noise only happens when I'm on the throttle and loading
the engine, stops completely as soon as I lift off the gas.

This only happens when it is <5°F, this morning it was -12°F and it
was very loud. I would describe the noise as a knocking or clacking.
There are also two levels to the sound. Under light throttle I have one
noise, and under hard throttle I have a different, louder, worse
sounding noise.

I get the noise even after letting the engine warm up completely, which
leads me to believe the noise is in the gear box, as this does not warm
up while idling. Also, the noise does go away after 10-15 minutes of
driving. It seems to happen in all gears and does not happen when I rev
the engine in neutral. From the driver seat, the noise seems to come
from directly below the center console, maybe a bit in front of the
shifter.

I have replaced the transmission fluid, maybe 15,000 miles ago with Subaru extra-s fluid.

Has any one else experienced these symptoms?
       

[2009 Forester Code P2097, bad fuel economy, replaced both O2 Sensors, what now?]

Not sure, bought the car used and haven't changed them

[2009 Forester Code P2097, bad fuel economy, replaced both O2 Sensors, what now?]

Always seems to start easily

[2009 Forester Code P2097, bad fuel economy, replaced both O2 Sensors, what now?]

I ran a bottle of fuel injector cleaner through, didn't see any change. Haven't looked into the injectors any further than that.

[2009 Forester Code P2097, bad fuel economy, replaced both O2 Sensors, what now?]

Hello All,

 

I'm new to the forum, and to Subaru ownership. I picked up a 2009 Forester SOHC, 5 speed, now with 65,000 miles. When new to me the car regularly got 27-28 MPG on the highway going 70mph.

 

Over the last month or two i noticed it slipping to 25-24-23, then one day the CEL came on, traction control light came on, and cruise control shut off and started flashing.

 

Got the code checked and cleared with the following results " P2097 Post catalyst fuel trim system too rich bank 1 confirmed" drove the car for approximately 100 miles, with fuel economy around 20mpg highway and then the light came back on, same code. So, i replaced the post catalyst O2 sensor. Drove another 100 miles or so, light came back on. This time i replaced the pre-cat upstream O2 sensor. (also changed the air filter while i was in there)

 

I haven't driven the 100 or so miles it seems to take the CEL to come back on, but judging by the fuel economy, around 20mpg highway, its only a matter of time and i have not fixed the underlying problem.

 

Any ideas what other systems or sensors might be causing this issue?

The car other wise runs, drives, idles, and starts normally. Power seems normal. perhaps a little bit of stutter when starting from a stop, but i might be imagining it. it's very slight if anything at all. might just be my clutch action....

 

Thanks for any help or ideas. I'll update again when/if CEL comes back on.