need help!!!!!

[HemiHog]

Ok, I've consulted the forums before with success so I've decided to ask y'all again.

I'm currently driving a 2009 1500 5.7L hemi(219,000km). A few months ago I have a multi-cylinder miss fire, I changed all the plugs, changed the destroyed coils, had dodge inspect and clean the injectors, #5 cylinder valve spring was cracked and replaced, compression test was perfect for its age, and fuel pressure was good. So my question is this, why the heck am I getting 24.2L/ 100km??? Granted it's lifted 4" on 33" tires, but that poor of mileage is ridiculous even with the tires and lift.

I would instantly think O2 sensors but wouldn't the computer indicate if they were faulty?

Any recommendations would be appreciated.

 

[ricky2010hemi]

Thats roughly the mileage I get, but I've got a pretty heavy foot

 

[HemiHog]

Just shocked with the work I have put into it

 

[Hootbro]

What kind of mileage was it getting before the work and failures?

 

[Saltillo Express]

Sometimes the O2 sensors will go bad and not set a code yet. Also I think any kind of cylinder cleaner can also temporarily affect the O2 sensor. Have you pulled one and looked at it?

 

[HemiHog]

18-19L/100km

 

[HemiHog]

Sometimes the O2 sensors will go bad and not set a code yet. Also I think any kind of cylinder cleaner can also temporarily affect the O2 sensor. Have you pulled one and looked at it?

I have not as I was told by dodge it would throw a code.

 

[HemiHog]

What kind of mileage was it getting before the work and failures?

Roughly 17-19L/100km