I hate to do this. But I can't drive my car. Exhaust help ASAP.

iRick. · 03-03-2011, 11:55 PM

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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iRick. · 03-04-2011, 01:45 AM

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.

Outbackllbean · 03-04-2011, 01:49 AM

Sounds like you dented or bent the exhaust pipe, that would make it low powered and not much noise.

Back Road Runner · 03-04-2011, 04:26 AM

Yeah, you probably crushed the piping somewhere and it's pinching off flow. How about getting under the car and looking at the thing.

GEE-OTTO · 03-04-2011, 08:49 AM

Quote:

Originally Posted by iRick.

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

GrimmSpeed · 03-04-2011, 12:47 PM

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

iRick. · 03-05-2011, 01:02 AM

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

03-03-2011, 11:55 PM	#1
iRick. Scooby Specialist Member#: 158155 Join Date: Sep 2007 Chapter/Region: BAIC Location: life is a potato.	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. * Registered users of the site do not see these ads. Last edited by iRick.; 01-12-2012 at 01:17 AM.

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03-04-2011, 01:45 AM	#2
iRick. Scooby Specialist Member#: 158155 Join Date: Sep 2007 Chapter/Region: BAIC Location: life is a potato.	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.

03-04-2011, 01:49 AM	#3
Outbackllbean Scooby Newbie Member#: 261790 Join Date: Oct 2010 Chapter/Region: International Location: Arcata CA Vehicle: 2002 OutBack LL bean Greenish	Sounds like you dented or bent the exhaust pipe, that would make it low powered and not much noise.

03-04-2011, 04:26 AM	#4
Back Road Runner Scooby Guru Member#: 60082 Join Date: Apr 2004 Chapter/Region: MWSOC Location: Minnesota Vehicle: 2004 Forester STI Silver	Yeah, you probably crushed the piping somewhere and it's pinching off flow. How about getting under the car and looking at the thing.

03-04-2011, 12:47 PM	#6
GrimmSpeed NASIOC Vendor Member#: 136396 Join Date: Jan 2007 Chapter/Region: MWSOC Location: Minneapolis, MN Vehicle: 2012 wrx white	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

03-05-2011, 01:02 AM	#7
iRick. Scooby Specialist Member#: 158155 Join Date: Sep 2007 Chapter/Region: BAIC Location: life is a potato.	yeah I'll be doing that..but I feel confident I burnt the sensors out with all this catless action.