What A/F ratio does everyone run at idle? I just put a wideband in my cobra and at the rear o2 sensor location at idle, my car is idling at about 10.2:1 which seems incredibly rich to me. It idles ok but you can definatly smell the rich burn.
A/F Ratio at Idle
- Thread starter GostaFly
- Start date
10.2 idle? Something is off...
Which wideband unit do you have, and how old is the sensor? Periodicaly these things require recalibration. I'll usually recal mine to fresh air for a couple minutes, every few months. I use the NTK WB unit, with the Bosch sensor ( std on almost all units, now days).
Which wideband unit do you have, and how old is the sensor? Periodicaly these things require recalibration. I'll usually recal mine to fresh air for a couple minutes, every few months. I use the NTK WB unit, with the Bosch sensor ( std on almost all units, now days).
Thats what I figured. I just fired off a question to fastlane motorsports who built the car. The driver side front O2 sensor is not installed, it is zip tied to the downpipe because the coolant pipe interfears with the bung, and I now wonder if the tune was using the drivers side rear o2 I removed to install the wideband o2 sensor.
I am new to the mustang world and came over from a supra with an AEM standalone so I am trying to pick up SCT tuning as quickly as I can.
I am new to the mustang world and came over from a supra with an AEM standalone so I am trying to pick up SCT tuning as quickly as I can.
imo, that is not good. something else should have been done to get the driver side o2 in there. there are aother ways to tune, but not by just using the rear 02 location in a turbo application. not that yours will, but motors have fried because they weren't tuned properly with the o2's in the correct locations.
piping should have been redone or something.
piping should have been redone or something.
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wtf, that sounds weird. You should use your front O2 sensors for idle and part throttle.
Do you have cats? The rear O2-bungs are located after cats. You should not read AFR after cats.
It sounds like they have your car running forced closed loop.
Verify the AFR and then call them. Something is very wrong.
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