Dirtman
Former Middleweight Moss Fighting Champion
- Joined
- May 28, 2018
- Messages
- 19,304
- Reaction score
- 13,326
- Points
- 113
- Location
- 41N 75W
- Vehicle Year
- 2009
- Engine Type
- 2.3 (4 Cylinder)
- Transmission
- Automatic
- 2WD / 4WD
- 2WD
- Total Lift
- It's up there.
- Total Drop
- It's down there.
- Tire Size
- Round.
- My credo
- I poop in the furnace.
My truck has a long term fuel trim of about +13 throughout the throttle range. I know this is below the threshold for a DTC but it's still high and means I'm using more fuel. The truck has the maf cleaned, new plugs and wires, checked for vac leaks, new air filter... all the basic stuff.
The truck has almost 70,000 miles which again is young for a o2 sensor to be bad but my truck does idle for very long periods. I put the bank 1 sensor 1 o2 sensor on a graph and its peak voltage only hits about .7. Again this is obviously still under the threshold for a DTC but it should peak to .9 volts correct?
Is it worth replacing the upstream o2 sensor? Any other ideas how to bring the fuel trim down?
The truck has almost 70,000 miles which again is young for a o2 sensor to be bad but my truck does idle for very long periods. I put the bank 1 sensor 1 o2 sensor on a graph and its peak voltage only hits about .7. Again this is obviously still under the threshold for a DTC but it should peak to .9 volts correct?
Is it worth replacing the upstream o2 sensor? Any other ideas how to bring the fuel trim down?