M271 ECU pin outs / wiring
09-18-2007, 02:31 PM
#2
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Midnight Blue 2004.5 C230 Kompressor Sport Sedan. 2002 w210 E320, 2009 w211 E350 Sport
Just saw this post. I'm bumping because I think it is good information for those that do or may know the info (...hint, hint...Calling mig888).
Out of curiousity, for what purpose?
Out of curiousity, for what purpose?
09-19-2007, 10:50 AM
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http://www.urdusa.com/product_info.p..._id=1230100028
it's programmable by boost, you can set it up something like this
3psi 14:1
6psi 13:1
9psi 12:1
...etc
and it will alter the stock wideband oxygen sensor's signal to the ECU to make it adjust fueling.
you know our cars run widebands (LSU4.x sensors). This is why if you use something like a 5th injector, a higher fuel rail pressure, a fuel controller to alter your MAS signal, or larger injectors, the ECU will detect the changes, and over time cancel out the added fuel based on feedback from the oxygen sensor...
The only way to adjust this is either chip the ECU (as mig has worked on) or to lie to the ECU about the final mixture by altering the AFR sensor signal...
...
That's why I asked...
...
it's programmable by boost, you can set it up something like this
3psi 14:1
6psi 13:1
9psi 12:1
...etc
and it will alter the stock wideband oxygen sensor's signal to the ECU to make it adjust fueling.
you know our cars run widebands (LSU4.x sensors). This is why if you use something like a 5th injector, a higher fuel rail pressure, a fuel controller to alter your MAS signal, or larger injectors, the ECU will detect the changes, and over time cancel out the added fuel based on feedback from the oxygen sensor...
The only way to adjust this is either chip the ECU (as mig has worked on) or to lie to the ECU about the final mixture by altering the AFR sensor signal...
...
That's why I asked...
...
09-19-2007, 12:12 PM
#4
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Midnight Blue 2004.5 C230 Kompressor Sport Sedan. 2002 w210 E320, 2009 w211 E350 Sport
http://www.urdusa.com/product_info.p..._id=1230100028
it's programmable by boost, you can set it up something like this
3psi 14:1
6psi 13:1
9psi 12:1
...etc
and it will alter the stock wideband oxygen sensor's signal to the ECU to make it adjust fueling.
you know our cars run widebands (LSU4.x sensors). This is why if you use something like a 5th injector, a higher fuel rail pressure, a fuel controller to alter your MAS signal, or larger injectors, the ECU will detect the changes, and over time cancel out the added fuel based on feedback from the oxygen sensor...
The only way to adjust this is either chip the ECU (as mig has worked on) or to lie to the ECU about the final mixture by altering the AFR sensor signal...
...
That's why I asked...
...
it's programmable by boost, you can set it up something like this
3psi 14:1
6psi 13:1
9psi 12:1
...etc
and it will alter the stock wideband oxygen sensor's signal to the ECU to make it adjust fueling.
you know our cars run widebands (LSU4.x sensors). This is why if you use something like a 5th injector, a higher fuel rail pressure, a fuel controller to alter your MAS signal, or larger injectors, the ECU will detect the changes, and over time cancel out the added fuel based on feedback from the oxygen sensor...
The only way to adjust this is either chip the ECU (as mig has worked on) or to lie to the ECU about the final mixture by altering the AFR sensor signal...
...
That's why I asked...
...
But awesome that you've been doing more research on it, nuc.
