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Can someone explain how Bank 1 & 2 should look along with Vault 1 & 2?
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I'm just trying to learn what each one should look like on a graph using my OBDII. I attached what Bank 1/Vault 1 was looking like, and Bank 2/Vault was very stable (essentially the opposite)
compared to the up and down on Bank 1/Vault. Do these look normal? I'm trying to figure out why my gas mileage is getting bad...
Last edited by Alex Medeiros; 05-10-2019 at 10:20 AM.
Ya my gas mileage has been going down for some reason. I've checked my rpms, throttle response, coolant temp, just about everything I can through my OBDII port and everything looked good. I did have a tow tune from a superchips but I switched from that tune to the 87 octane tune because it was more efficient than the tow tune when I had it equipped. Maybe the tow tune was making my gas mileage worse but I'm not sure. I'm currently running a can of seafoam through the gas tank and hoping that'll help.
mine varies from 11 to 18mpg imperial...all depends on how I drive it. I would look at the LT fuel trim and map readings....maybe pull a plug and see if it black...a sign of overfueling. FT should be +/-10%
Is the march number accurate? Wonder if it has to do with the switch from winter blend gas, to summer blend.....
I find it funny because March is when I bought my superchips tuner (started using it right before April). Maybe that was making my gas mileage crap the bed. In April my Coolant Reservoir started to leak so I had to drive a week with it somewhat leaking. It's been replaced for a month and I've had no issues.
Last edited by Alex Medeiros; 05-10-2019 at 10:20 AM.
mine varies from 11 to 18mpg imperial...all depends on how I drive it. I would look at the LT fuel trim and map readings....maybe pull a plug and see if it black...a sign of overfueling. FT should be +/-10%
Later today I'll try to look at the Fuel Trim Mixture and see if it's close to +/-10%.
mine varies from 11 to 18mpg imperial...all depends on how I drive it. I would look at the LT fuel trim and map readings....maybe pull a plug and see if it black...a sign of overfueling. FT should be +/-10%
I checked the Fuel Trim while driving. The LT never went past +/-10%, which means it was operating correctly from what I understand.
I checked the Fuel Trim while driving. The LT never went past +/-10%, which means it was operating correctly from what I understand.
Yup.
All else being equal, it still may be O2 sensors. If they are original, or have close to 100K miles on them, it sure wouldn't hurt anything to replace them. NTK or Denso brand only please, and yes, it DOES matter.
All else being equal, it still may be O2 sensors. If they are original, or have close to 100K miles on them, it sure wouldn't hurt anything to replace them. NTK or Denso brand only please, and yes, it DOES matter.
Ya my truck has 110k miles on it. I'll see if I can get the truck checked out by my mechanic and have him run some tests on it. I hope it's just the O2 sensor(s) and nothing else.
05-09-2019 | 10:28 PM
Gas mileage poor... need help plz
