Question about 1993 Pontiac Grand Prix

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Where is the o2 sensor on a 1993 pontiac grand prix

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One is behind the engine on the exhaust manifold, between the engine and fire wall. The other is under the car behind the catalytic converter.

Posted on Mar 27, 2015

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On the exhaust pipe

Posted on Mar 27, 2015

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My 1993 pontiac grand prix with the 3.1 engine stalls when it idles at a stop light but it starts right back up. it has plenty of power. we changed the o2 sensor did the vaccum leaks and ths spark plugs....


The next thing to try in regards to the stalling would be to change out the Throttle Position Sensor this sensor is the usual cause of this symptom.

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I wouldn't have gotten a cat. If the o2s are all replaced, then it could be an EGR valve

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THIS IS THE O2 SENSOR CLOSEST TO THE ENGINE AND BEFORE THE CONVERTER.

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BAD RUNNER


Check the fuel pressure regulator. Pull off the vac line to it and see if any gas is leaking out of the vacuum fitting. If you see any fuel replace the regulator.

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O2 sensor 2002 pontiac gran prix


It is in the exhaust pipe on the engine side of the catalytic converter, it is round, you may need a special socket to get it out.

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