How do O2 Simulators Work?
Thread Starter
Drifting
Joined: Sep 2000
Posts: 1,456
Likes: 5
From: Bothell WA
How do O2 Simulators Work?
I've been thinking about getting headers for my car and I notice that O2 simulators are being included with many FLP Header packages. So I wonder how the O2 simulators work? Its my understanding that the computer reads the real O2 sensor and adjusts the air/fuel ratio depending on the reading. So what does an O2 simulator do to the computer's attempts to adjust A/F ratios? I would think it would prevent the computer from fine tuning the A/F ratio for better performance. Thoughts?
- Mark
- Mark
Thread Starter
Drifting
Joined: Sep 2000
Posts: 1,456
Likes: 5
From: Bothell WA
Re: How do O2 Simulators Work? (vstella)
Ok, so the computer can no longer adjust A/F ratios because is being tricked. So what down side does this have? I would guess that it can not adjust for any modifications to the engine, so you should have a custom programming done any time to make a change. I would guess that it can not adjust for altitude changes because it can't sense that the O2 level is changing. I assume its a given that emissions would increase. I would also guess that fuel economy is decreased. I would also be afraid that general drivability would suffer. Is any of this true?
- Mark
- Mark
Drifting
Joined: Jul 2000
Posts: 1,818
Likes: 2
From: SoCal
Re: How do O2 Simulators Work? (Chris@SpeedDemon)
Rear O2 sensors only tell the computer whether the cats are functioning or not. AF is determined by the front O2 sensors only. :)
Good Luck,
Good Luck,
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