ecoboost 2015 fuel consumption problem

[mbobs]

Any other symptoms? I can list a tone of issues but none of them can be relevant. Bad exhaust weld, clamp, or catalytic converter, fuel injection issue, air hose leak, cracked cylinder head, blown head gasket, overheating, transmission ....

Usually you would feel the car become sluggish with any of those issues or see physical symptoms like smoke or bad smells. I had a furry friend chew through my air hose once so you never know. Do you physically have to add more fuel more frequently?

emm i guess its engine open loop after o2 issue , fuel frequently 16-18 MPG
but why check engine lamp not working ?

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[mbobs]

hello anybody here