96 EX MPG and 02 / Fuel Trim Readings
08-23-2011, 06:36 AM
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96 EX MPG and 02 / Fuel Trim Readings
Hi,
I have a 96 accord that has always had decent mpg, probably because I drive it conservatively. it bounces from 25 MPG to almost 29 MPG.
I recently loaded the Torque application on my phone and got a bluetooth transmitter to feed it ECM data. So now I have fuel trim and O2 voltages, but I am not sure what they tell me.
The O2 voltages are always between 0 and 1, and stay pretty constant while crusing on the highway. sensor 1 is about .2 and the rear is .8. At other speeds and driving conditions they seem to fluctuate. That is also true on a newer pontiac that I have.
My F/T readings are anywhere from -2 percent to 46.9%!!! The F/T seems to climb to 46.9 and stay there for about 1 or 2 minutes and then either drops off, or I go into an open loop condition because of insufficient cat temp. On a 10 minute trip, it might hit 46.9% two times and spends the rest of the time typically between 0 and 10%.
I still have to do some legwork to determine if there are exhaust or intake/vacuum leaks, but I was hoping these readings might trigger some feedback from the experts.
Thanks!!
96 accord ex A/T 190K miles
I have a 96 accord that has always had decent mpg, probably because I drive it conservatively. it bounces from 25 MPG to almost 29 MPG.
I recently loaded the Torque application on my phone and got a bluetooth transmitter to feed it ECM data. So now I have fuel trim and O2 voltages, but I am not sure what they tell me.
The O2 voltages are always between 0 and 1, and stay pretty constant while crusing on the highway. sensor 1 is about .2 and the rear is .8. At other speeds and driving conditions they seem to fluctuate. That is also true on a newer pontiac that I have.
My F/T readings are anywhere from -2 percent to 46.9%!!! The F/T seems to climb to 46.9 and stay there for about 1 or 2 minutes and then either drops off, or I go into an open loop condition because of insufficient cat temp. On a 10 minute trip, it might hit 46.9% two times and spends the rest of the time typically between 0 and 10%.
I still have to do some legwork to determine if there are exhaust or intake/vacuum leaks, but I was hoping these readings might trigger some feedback from the experts.
Thanks!!
96 accord ex A/T 190K miles
