Fuel-Air Value in Datamaster ?
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From: Ft. Worth, TX
Car: 89 Turbo Trans Am and lots of non-3rd gens
Engine: 231 SFI Turbo's, LT4, LT1
Transmission: 2004r, 4L60E
Fuel-Air Value in Datamaster ?
This value is always at 445 when in closed-loop, but varies when in open loop or in PE mode.
What are these values telling me? I suspect anything higher than 445 is rich and anything below would be lean??
Or is this the targeted Fuel-Air value the ECM is trying to adjust to?
What are these values telling me? I suspect anything higher than 445 is rich and anything below would be lean??
Or is this the targeted Fuel-Air value the ECM is trying to adjust to?
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Re: Fuel-Air Value in Datamaster ?
Originally posted by 2QUIK6
This value is always at 445 when in closed-loop, but varies when in open loop or in PE mode.
What are these values telling me? I suspect anything higher than 445 is rich and anything below would be lean??
Or is this the targeted Fuel-Air value the ECM is trying to adjust to?
This value is always at 445 when in closed-loop, but varies when in open loop or in PE mode.
What are these values telling me? I suspect anything higher than 445 is rich and anything below would be lean??
Or is this the targeted Fuel-Air value the ECM is trying to adjust to?
Sounds like our looking at the O2 voltage.
The ecm applies a small volatage (.445-.5) to the O2, and as it wakes up it generates enough current and voltage to change this value. Over it is like you noted rich, and less lean.
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