LT1-LT4 Modifications 1993-97 Gen II Small Block V8

where is our O2 sensor?

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Old Aug 19, 2004 | 06:31 PM
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Default where is our O2 sensor?

I just got my 02 sensor replaced at the dealership for what seemed like a good price ($165) would this have been easier to buy the part and put on myself or would it be too difficult for a noob like me? where are the sensors located? It took the guy over 2 hours to do and he said it was quite a bitch of a job, but im not sure if it was BS.

BTW it completely solved the hesitation problem and my car is back kicking *** again
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Old Aug 19, 2004 | 07:08 PM
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for you its on the manifolds above the ypipe. he prolly had to drop the ypipe to get it in and out.
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Old Aug 19, 2004 | 08:20 PM
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Somebody was telling me to get new O2 sensors for my own hesitation problem - so it's on the exhaust manifold? Do we (LT1 owners) have 2 sensors, or 4?? I'm assuming there's gotta be at least 2 of them; one before the cat and one after.
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Old Aug 19, 2004 | 09:50 PM
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Originally Posted by John95Z28
Somebody was telling me to get new O2 sensors for my own hesitation problem - so it's on the exhaust manifold? Do we (LT1 owners) have 2 sensors, or 4?? I'm assuming there's gotta be at least 2 of them; one before the cat and one after.
pending the yr of your car as to how many 02's you will have

93-95 yrs. the first 2 will be right at the connecting point of the manifold and the y-pipe. on both sides of the engine

96-97 yrs. the first 2 will be located in the same spot and then the next 2 will be AFTER the cat convertor's on both sides
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Old Aug 19, 2004 | 11:00 PM
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Originally Posted by Z284thgen
93-95 yrs. the first 2 will be right at the connecting point of the manifold and the y-pipe. on both sides of the engine

96-97 yrs. the first 2 will be located in the same spot and then the next 2 will be AFTER the cat convertor's on both sides
OK thanks - that's good to know. I've got a '95 so I've only got 2 (one in each manifold). I was just looking in the fbody FAQ and it said the same thing, that in '96 having OBDII brought more O2 sensors to help monitor things.

That's one more reason I'm glad I've got a '95!
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Old Aug 19, 2004 | 11:29 PM
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OBD-I is teh bestoz boyyyyeeeeee

(sarcasm)
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Old Aug 19, 2004 | 11:37 PM
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Only the the front 2 O2 sensors are monitored to correct fuel trim. The rear O2 sensors simply monitor the efficincy of the cats.
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