Let's solve my 20V conversion problems
03-23-2010, 05:37 PM
Post: #6
Dialling the richness out....
If you are running a programmable ECU, you have the ability to set the
fuel map to whatever A/F ratio you choose. If you also have a WBO2
sensor and gauge, you can also monitor your A/F ratio to see where it
is running rich, and make the appropriate adjustments to the fuel map.
In many cases, the ECU can run closed loop with the WBO2 sensor to
automatically adjust the fuel map to achieve your target A/F ratio.

Factory ECU´s run closed loop with the narrow band sensor, but they rely
on the sensor putting out the correct voltage. If the sensor is old and out
of spec, the ECU can run rich. They also run open loop (and richer) after
about 80% throttle opening (richer for more power and greater cooling).

However, I don´t know if the OMEX does this, or if you O2 sensor is wide
band or narrow band (factory style). If it is narrow band, they are quite
rugged units. If they get carboned up, you can sometimes clean them up
externally with a wire brush, and then heat the sensor end with a butane
torch to bring them back to life. If yours hasn´t been replaced for 50,000
miles its time for a new one Smile

Anyways, a dyno tune will sort out your fuel map.

Cheers... jondee86

PS: Yes, I am on holiday, so I have a bit of time on my hands Tongue
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Messages In This Thread
One thing at a time.... - jondee86 - 03-23-2010, 02:01 AM
[] - Jezza_hr - 03-23-2010, 02:37 AM
Dialling the richness out.... - jondee86 - 03-23-2010 05:37 PM
[] - Jezza_hr - 03-24-2010, 02:15 AM
In a reflective mood... - jondee86 - 03-24-2010, 10:15 PM
[] - Miguel - Newera - 04-01-2010, 04:02 AM
[] - Jezza_hr - 04-01-2010, 09:18 PM
[] - fkn16v - 06-16-2010, 01:48 PM

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