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Old 02-06-2021, 05:26 PM   #19
jimmy12345678
Scooby Newbie
 
Member#: 516695
Join Date: Jul 2020
Vehicle:
2008 Impreza 2.5i

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Update:

Finally had a chance to recreate the conditions previously mentioned, and while the noise seems to have lessened some, it is still there along with what I feel is a lack of power, coupled with a "burning" smell that's noticeable under heavy load after about a minute or so.

I'm starting to question whether the cheap Amazon catalytic converter I installed is clogged or failing and causing both a lack of power and valve flutter at high RPM's that are causing both the noise and lack of power up steep grades. I haven't checked back pressure yet but I do have a gauge to do so if that would be prudent.
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