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difference between o2 sensor in x-pipe vs in cat.
What is the difference between the two sensors, and how does running without the cat and the corresponding sensor affect the engine?
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1990 944 T: 100 000 km/63K miles, 1997 986 2.5L: 95 000 km/60K miles, Living in the trackless land of plenty! |
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09-22-2010, 10:51 AM
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Or is the sensor in the cat a temperature sensor?
Is this a not a common sensor on US cars? My car is a Japanese import. I would like to know if I can remove it when going to a high flow cat, or whether I need to have a bung welded to the new cat.
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1990 944 T: 100 000 km/63K miles, 1997 986 2.5L: 95 000 km/60K miles, Living in the trackless land of plenty! |
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09-23-2010, 11:01 AM
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Location: Chicagoland
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my acura had 2 sensors. one precat is wideband for the ECU to control AF. one postcat is narrowband to test emissions. guessing same kind of setup on the 951.
if u remove the second, it'll prob throw a code thinking the cat isn't working...which it isn't. |
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09-23-2010, 11:08 AM
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I'm certain that none of them is a wideband as the DME can't handle wideband signals.
The x-pipe o2 sensor is a 3-wire heated sensor while the one in the cat is a single wire sensor. Anyone?
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1990 944 T: 100 000 km/63K miles, 1997 986 2.5L: 95 000 km/60K miles, Living in the trackless land of plenty! |
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09-23-2010, 11:55 AM
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Location: Auckland, New Zealand
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The sensor in the Cat is a temp sensor on the Jap Market cars only (Part # 951 606 019 00). No longer available from Porsche. This sensor is not linked to the DME as far as I know and only controls the "EX" light on the dash. If you are removing the cat then grounding that sensor wire should stop the blinking "EX" light on the dash
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09-23-2010, 10:32 PM
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Ta mate.
That clears things up and explains why nobody new about this sensor. Btw. I lived in Te Kauwhata for a year. You've got some amazing roads down there. Would have loved to have had my car back then, or maybe even a Subaru WRX...
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1990 944 T: 100 000 km/63K miles, 1997 986 2.5L: 95 000 km/60K miles, Living in the trackless land of plenty! |
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09-23-2010, 11:00 PM
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Location: Auckland, New Zealand
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Yeah they are sweet roads. Funny you mention that because the last time I was out there in my S2 I had a WRX duelling with me. Mechanically I don't mind WRxs it's just the spotty, caps on backwards, sagging pants teenagers that are drawn to them that bothers me....
(let the flaming begin...lol) |
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09-24-2010, 10:05 PM
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