My car has an NTK 5 wire O2 sensor so I assume it's a wideband O2. If that is the case why does my Ultragauge give readings from .1-.9 volts instead of 0-5 volts?
Been trying to chase down a reason for falling MPG, it's dropped 8-10 mpg in the past 8 months.
Thought at first it was bad gas, but after trying different grades and stations, it continues to go down.
Cat temps are normal as is oil temp so I don't think the calipers are causing brake drag.
Short and long fuel trims HAVE changed with the long reading richer, the commanded AFR which reads in Lambda also reads richer.
No CEL either.
Help.
Been trying to chase down a reason for falling MPG, it's dropped 8-10 mpg in the past 8 months.
Thought at first it was bad gas, but after trying different grades and stations, it continues to go down.
Cat temps are normal as is oil temp so I don't think the calipers are causing brake drag.
Short and long fuel trims HAVE changed with the long reading richer, the commanded AFR which reads in Lambda also reads richer.
No CEL either.
Help.