Running Rich/Off.. headers?

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Jul 10, 2011 | 04:04 AM

garychurchill

Thread Starter

Pro

Joined: Feb 2007

Posts: 538

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From: Orlando FL

Running Rich/Off.. headers?

OK. I know my 95 USED to get better mileage.... as well as now the stainless tips are a little dark and the car is smelling like it is running rich. Here's the scenario...

Long tube Headers installed around a half year ago-ish... Eliminated the cats as there wasn't much room. Only running the 2 O2 sensors, and the third on the passenger side is not hooked up.

So either.... I need to replace and plug that third sensor in? Or somehow fork over big bucks to jam the high flow cats back up in there....

Thoughts?

Jul 10, 2011 | 07:49 AM

Charleston2012

Melting Slicks

Joined: Jun 2010

Posts: 2,178

Likes: 1

Did you tell the ECM you eliminated cats by tuning out rear o2?

Jul 10, 2011 | 01:35 PM

5abivt

Safety Car

Joined: May 2002

Posts: 4,659

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From: Toronto ontario

First thing is check for exhaust leaks. ANY small leak remotely close to the o2 sensors and it will start running rich. Check your plugs to see if they are fouled.

Jul 10, 2011 | 01:37 PM

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,263

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From: O'Fallon Missouri

The third o2 sensor is not causing your problem, it is useless.

Jul 10, 2011 | 05:20 PM

96 lt-4

Drifting

Joined: Oct 2005

Posts: 1,920

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From: Angier nc

95 should'nt have a 3rd o2 sensor should it?

Start with the basics and verify the tuneup.Clean the mass airflow meter.

Jul 10, 2011 | 05:39 PM

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,263

Likes: 86

From: O'Fallon Missouri

Quote:

Originally Posted by 96 lt-4

95 should'nt have a 3rd o2 sensor should it?

94/95 had one post-cat o2 sensor. Why, who knows?

Jul 10, 2011 | 05:56 PM