I just got this car. I replace the air filter and started noticing it bogging down under full throttle.

• up to 1/2 throttle it's fine.
• push it all the way down gets interesting:
  • Motor gets loud. fog horn sound. like it's bogging down,
  • Slow pickup lke it's not advancing.

Possible Causes:

• Do these filters need to seal down in the box?
• Can you put these in reversed, does that matter?
• Maybe the filter seal or some vacuum line is messing with the vacuum advance?

 

2.2 Outback Sport which has a the big rectangle box under the hood scoop.

 

Thanks for the help.

Edited December 26, 201312 yr by nathan.chase

I suspect that the air filter box is not secure..............particularly if the motor was running well immediately before installing the new air filter......................

 

Check to see that the filter is seated properly, and that the lid seats properly, then it is important that all the closure clips are snapped down properly.

 

Hope this helps!

or you popped a vacuum line...

thanks. You were right! the box is hard to line up and it wasn't making a good seal.

thanks. You were right! the box is hard to line up and it wasn't making a good seal.

I assume that fixed the problem??