2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

O2 sensor Q's.

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Old Aug 15, 2001 | 12:16 PM
  #2  
Wankel7's Avatar
Haven't we ALL heard this
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From: Indiana
Go to advanced auto or some auto parts store and fetch your self a Bosch universal replacment. $20-40 for one.

James
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Old Aug 15, 2001 | 05:00 PM
  #4  
FlyGuy2000's Avatar
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From: Houston
i put a bosch universal in my '90 GTU and the threads matched.
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Old Aug 15, 2001 | 08:31 PM
  #5  
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HAILERS
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From: FORT WORTH, TEXAS,USA
If it helps, I have a Bosch in my Racing Beat headers. No problems.Only cost 26 bucks at Pep Boys. I think they should be changed every couple of years. No real good reason.
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Old Aug 15, 2001 | 08:36 PM
  #6  
Suparslinc's Avatar
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From: Cincinnati
I heard that aftermarket O2 sensors don't last more than like 10 minutes in an RX-7. Could just be rubbish though you never know what to believe on this damn forum.
My 02 sensor has 180k on it. The engine light came on a few months back, 02 sensor, I jiggled the wire and no light since.
Joe
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Old Aug 15, 2001 | 10:45 PM
  #8  
fc3s.org's Avatar
OG
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From: Charlotte NC
Originally posted by IdentiD FC


I heard this too somewhere. The reason I'm asking is some guy mentioned that his O2 sensor never gave him any problems, but he decided to replace it anyway, and he regained massive HP that he had somehow lost because the O2 sensor was so old. I'm wondering if this same will be true with my vehicle.

For those of you who replaced it, did you notice better MPG or a bit extra torque and power?
The only thing you will gain by replacing the O2 sensor is better MPG. The O2 sensor is used in closed loop (cruising) to help regulate your fuel usage. A new O2 will provide better data to the ECU, and allow the ECU to correct A/F levels to maintain the speed, but at the best MPG possible. It will not gain HP or torque.

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Old Aug 15, 2001 | 10:49 PM
  #9  
fc3s.org's Avatar
OG
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From: Charlotte NC
Originally posted by Wankel7
Go to advanced auto or some auto parts store and fetch your self a Bosch universal replacment. $20-40 for one.

James
From NOPI.com -

973+0033 BOSCH - w/o connector 1308cc Rotary, incl. Turbo $17.68

That is the one that I got for my 86 TII and I cooked it. Well, I ran the engine so rich that it lost readability. The A/F meter would go nuts. I replaced it after I got the A/F ratio back to normal, and replaced the O2 sensor. Now it reads normal.

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