how to run leaner?
- Thread starter camry90
- Start date
Gary ST165
New member
# adjustable fuel pressure regulator: > reduce base fuel pressure, monitoring with wideband etc
# and / or tension the AFM spring 2 clicks tighter ( it will also run a fraction leaner @ idle)
# and finally, the narrow band O2 sensor as used in closed loop / cruise might be bad
(on my last refill the RC delivered 340 miles / 547km to a tankful > brimming to orange fuel light)
# and / or tension the AFM spring 2 clicks tighter ( it will also run a fraction leaner @ idle)
# and finally, the narrow band O2 sensor as used in closed loop / cruise might be bad
(on my last refill the RC delivered 340 miles / 547km to a tankful > brimming to orange fuel light)
___Scott___
Active member
Adjustments you make to the AFM will eventually only apply to open-loop mode. I say eventually because the ECU learns over time, based on feedback from the O2 sensor. So you can tighten the spring in the AFM and notice a difference, but that difference will gradually go away.
In order to effectively fool the ECU, you need to intercept the O2 signal and modify it. Then you can run leaner during closed-loop mode where most of your driving happens anyway.
In order to effectively fool the ECU, you need to intercept the O2 signal and modify it. Then you can run leaner during closed-loop mode where most of your driving happens anyway.
underscore
Well-known member
Yeah I thought I was running rich, then my O2 wire broke. Now I'm down near wankel engine fuel economy!
My questions is are all 02 sensors the same?
Like if I buy a universal type off ebay does it do the same job or should I look for a better one? OEM or high quality after market type?
On my car the wire to the O2 (top one) is frayed and about to break any time and the one in the bottom of the exhaust downpipe- the previous owner disconnected it. When I plug it in the engine idle become rough
Cheers
Freddo
Like if I buy a universal type off ebay does it do the same job or should I look for a better one? OEM or high quality after market type?
On my car the wire to the O2 (top one) is frayed and about to break any time and the one in the bottom of the exhaust downpipe- the previous owner disconnected it. When I plug it in the engine idle become rough
Cheers
Freddo
