Wideband offset and alternator
01-08-2016, 04:34 AM
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Wideband offset and alternator
Hello guys,
I'm dealing with a fully built B16A turbo Honda Civic, EG6 chassis.
Car rans fine, no problem at all BUT, we have an offset problem between the wideband (AEM 30-4110) and the ECU (S300 over P28 ecu).
When the engine is on, there is no way to match wideband's reading and S300's readings. When we match readings at 14:1 AFR, if it goes to rich or lean, readings are too different. (near 12's of wideband readings, ECU shows 11's). Voltage vs AFR values are matched as AEM says.
We tried to unplug the alternator connector and voilá! readings matches perfectly from 11's to 16's. Alternator is in good condition, anyway we tried using another perfectly working alternator from a friend's EG6 and the issue still annoys.
Grounding is perfect, all cables had checked, we tried to use either ELD input (Removing the two resistors) and analog inputs from S300's board. There is no ground offset at all (measured with an high quality kyoritsu multimeter).
Anyone can help us? Thanks!
I'm dealing with a fully built B16A turbo Honda Civic, EG6 chassis.
Car rans fine, no problem at all BUT, we have an offset problem between the wideband (AEM 30-4110) and the ECU (S300 over P28 ecu).
When the engine is on, there is no way to match wideband's reading and S300's readings. When we match readings at 14:1 AFR, if it goes to rich or lean, readings are too different. (near 12's of wideband readings, ECU shows 11's). Voltage vs AFR values are matched as AEM says.
We tried to unplug the alternator connector and voilá! readings matches perfectly from 11's to 16's. Alternator is in good condition, anyway we tried using another perfectly working alternator from a friend's EG6 and the issue still annoys.
Grounding is perfect, all cables had checked, we tried to use either ELD input (Removing the two resistors) and analog inputs from S300's board. There is no ground offset at all (measured with an high quality kyoritsu multimeter).
Anyone can help us? Thanks!
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