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Ryland · 10-07-2013, 06:59 PM

Did you try unplugging the o2 sensor to see if it would run better without it, mileage should be better then 35mpg with the ecu running in open loop.
Only thing that I've seen that would kill an o2 sensor on a VX engine was over size exhaust.

10-07-2013, 06:59 PM	#12 (permalink)
Ryland Master EcoModder Join Date: Jan 2008 Location: Western Wisconsin Posts: 3,903 honda cb125 - '74 Honda CB 125 S1 90 day: 79.71 mpg (US) green wedge - '81 Commuter Vehicles Inc. Commuti-Car Blue VX - '93 Honda Civic VX Thanks: 867 Thanked 434 Times in 354 Posts	Did you try unplugging the o2 sensor to see if it would run better without it, mileage should be better then 35mpg with the ecu running in open loop. Only thing that I've seen that would kill an o2 sensor on a VX engine was over size exhaust.