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Old 03-03-2011, 11:55 PM   #1
iRick.
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Member#: 158155
Join Date: Sep 2007
Chapter/Region: SCIC
Location: 2014 WRX
Default I hate to do this. But I can't drive my car. Exhaust help ASAP.

I hate to make one of those threads.. but I have no choice.

Car is 2007 Impreza. 82000 miles.

The other day I hit an extremely large pothole, large enough for the frame to hit the road.

Here is what I am currently running:

Ebay UEL headers (been on car for over 2 years)
Ebay CAT (throwing codes o2 sensors are probably toast)
Custom catback

It was loud, but not unbearable. Sounded great. My car has been throwing a CEL + Blinking cruise light for over a year. Never affected driving, so I ignored it.

Ever since I hit that pothole, my car became incredibly quiet. It makes absolutely no sense, I mean as quiet as stock.

Now I suddenly have almost no power going uphill, I have to floor it just to get going anywhere, and when it reaches 3k-4k RPM I feel a vibration coming from up front.

I heard there is a possibility of poorly made CATs essentially blowing up on the inside and causing a severe block. So I did the trick of wrapping a towel around my hand and hitting the CAT, sure enough, it sounds like coins in a tin can.

So I'm going to go back to what I used to have, to see if it solves the problem. This was my old set up:

Ebay UEL headers
Custom straight pipe with o2 bungs welded in (Still threw CEL)
Espelir JGT500 catback welded to straight pipe

Sounded like a beast and I loved it. So my question is.

problem solved. the catalytic converter was cheap. got damaged in the pothole, and the insides restricted 80% of the exhaust flow. catalytic converter was cut out and replaced with a pipe.
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Last edited by iRick.; 01-12-2012 at 01:17 AM.
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Old 03-04-2011, 01:45 AM   #2
iRick.
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Join Date: Sep 2007
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Location: 2014 WRX
Default

Nevermind Since I'm selling the car in the future.. I've come to the rational realization that I'm just going to put everything back to stock and replace the o2 sensors.
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Old 03-04-2011, 01:49 AM   #3
Outbackllbean
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Chapter/Region: International
Location: Arcata CA
Vehicle:
2002 OutBack LL bean
Greenish

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Sounds like you dented or bent the exhaust pipe, that would make it low powered and not much noise.
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Old 03-04-2011, 04:26 AM   #4
Back Road Runner
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Location: Minnesota
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2004 Forester STI
Silver

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Yeah, you probably crushed the piping somewhere and it's pinching off flow. How about getting under the car and looking at the thing.
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Old 03-04-2011, 08:49 AM   #5
GEE-OTTO
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Location: Arlington VA
Vehicle:
2009 Legacy GT
OBP

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Quote:
Originally Posted by iRick. View Post
Nevermind Since I'm selling the car in the future.. I've come to the rational realization that I'm just going to put everything back to stock and replace the o2 sensors.
Good idea
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Old 03-04-2011, 12:47 PM   #6
GrimmSpeed
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Location: Minneapolis, MN
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2013 BRZ
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o2 sensors are expensive, i would return it back to stock and reset the ECU before buying new sensors. It could save you a couple hundred bucks

Mike
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Old 03-05-2011, 01:02 AM   #7
iRick.
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Location: 2014 WRX
Default

yeah I'll be doing that..but I feel confident I burnt the sensors out with all this catless action.
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