O2 Sensor or no O2 Sensor, that is the question...
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O2 Sensor or no O2 Sensor, that is the question...
At one point I was running no O2 sensor and had my 5th and 6th ports being opened by the hole in the exhaust manifold where the O2 sensor would be. My car "seemed" faster with that setup. I now have an O2 sensor installed and I have my air pump assisting the ports. Lookin for any ideas. I didnt know if the car would run rich or lean without the O2 sensor. I figure it will run much richer. Thanks.
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You won't notice any difference from running without an O2 sensor. It's only used during light-load cruise, and helps improve mileage slightly. Expect about 5% improvement in mixed-use driving. It has no effect on performance whatsoever.
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I think it may have been that my O2 sensor hole in the exhaust helps the ports open better than the air pump. But I have noticed that at around 7000 rpms that my car wouldnt hit redline as fast. But it seems to rev quicker. (shrugs)
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5% increase???????? is that it?
-Ben
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My ports must not have opened up with the air pump idea. My car is faster and revs quicker with the O2 sensor out and the plumbing to the ports from the hole in the exhuast manifold.
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Originally Posted by RX7_Racer_84
I think it may have been that my O2 sensor hole in the exhaust helps the ports open better than the air pump. But I have noticed that at around 7000 rpms that my car wouldnt hit redline as fast. But it seems to rev quicker. (shrugs)
My ports must not have opened up with the air pump idea. My car is faster and revs quicker with the O2 sensor out and the plumbing to the ports from the hole in the exhuast manifold.
My ports must not have opened up with the air pump idea. My car is faster and revs quicker with the O2 sensor out and the plumbing to the ports from the hole in the exhuast manifold.
Originally Posted by apexFD
5% increase???????? is that it?
That 5% improvement is what I measured over many hundreds of kilometers both with and without an O2 sensor, in an average mix of driving conditions.
Originally Posted by M.C. Language
the air pump must not be supplying proper air flow.. pull that hunk of **** air pump out and route air to the ports via another way
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Am I supposed to put the split air pipe from my cat to the air pump? I've learned where it comes from the exuast, but im not sure where the other end goes, the fsm diagram is a bit shady as far as that end goes.
BTW, my car is an '87 n/a
Last edited by ziplock; 05-23-07 at 12:46 AM.
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