Having problems with my o2 sensor
01-12-2004, 09:18 AM
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Having problems with my o2 sensor
I think I am having problems with my o2 sensor. It started a few weeks ago with winter.
My a/f meter read extremely lean. Its all the way to the left. My Apexi turbo timer read between 0.00v and 0.03v. The car runs super rich. I know that because the EGT is lower then he usualy is on the highway. At 70mph it used to be between 1000-1100f and now its at 800-900f. And I can barely do 250km with a full tank of gaz when I used to do 375km easily.
The car is jerky sometimes and I also have an unstable idle.
The bizarre thing is the o2 sensor work sometimes. For exemple if I speed up in 4th gear to pass somebody. Lets say the EGT gets to 1100f. Then the a/f and o2 voltage will get back to normal for a few minutes then it goes back to running like ****.
I changed the o2 sensor with another one I had. It worked fine for 24 hours then the trouble came back.
Any idea?
My a/f meter read extremely lean. Its all the way to the left. My Apexi turbo timer read between 0.00v and 0.03v. The car runs super rich. I know that because the EGT is lower then he usualy is on the highway. At 70mph it used to be between 1000-1100f and now its at 800-900f. And I can barely do 250km with a full tank of gaz when I used to do 375km easily.
The car is jerky sometimes and I also have an unstable idle.
The bizarre thing is the o2 sensor work sometimes. For exemple if I speed up in 4th gear to pass somebody. Lets say the EGT gets to 1100f. Then the a/f and o2 voltage will get back to normal for a few minutes then it goes back to running like ****.
I changed the o2 sensor with another one I had. It worked fine for 24 hours then the trouble came back.
Any idea?
01-12-2004, 12:33 PM
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Re: Having problems with my o2 sensor (Maxime)
when the car is super-extremely-mega rich, the O2 sensor will start to produce a negative voltage, that's why your meter reads 'lean'. You are jus running incredibly rich, so why don't you change that? Am I missing something?
01-12-2004, 01:32 PM
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Re: Having problems with my o2 sensor (ion_four)
I am running the exact same setting I was running for 6 months and I had no problems at all. Why would I need to change them now? And why would those setting = super-mega rich all of a sudden?
The only thing I can see is maybe my SMC+ is dying? Or it doesnt like the -30C temp we have right now?
The only thing I can see is maybe my SMC+ is dying? Or it doesnt like the -30C temp we have right now?
01-13-2004, 10:32 AM
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my car also does this but i have Hondata. someone sugggested it was because of my bosch O2 senso no being able to react as fast as the OEM honda O2 and messing with the Hondata's abilities.
NOTE: the car runs fine on a Wideband O2.
I am going to buy a NEW honda O2 soon. I cant aford to run super rich all the time.
NOTE: the car runs fine on a Wideband O2.
I am going to buy a NEW honda O2 soon. I cant aford to run super rich all the time.
That can't be good for the turbo. 
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02-24-2004, 11:05 AM
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Re: (Maxime)
Problem still present. We changed the oxygen sensor many times. It always works fine for a couple of days then the problem come back.
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