I have been having on and off issues all starting from a blown valve gasket that leaked into the plugs.
I have replaced my Plugs, Coils, all 4 O2 sensors, The EGR and the Tube that runs to the exhaust manifold under the EGR


One of my Cats was completely clogged from the Gasket issue and the other was partially so I put straight pipes until I could figure out what was going on.
and rather than my MPG going up from 16-17 it dropped to 13-15 and that's mostly highway.
I'm not throwing any codes but I have two issues when I run Torque

I have no idea what to check now But I would really appreciate some help please

 

 

Neither of those are indications of an actual fault, they're programming errors in the app. Ignore them.

 

Ok so what would cause the Miles per gallon to have such a drastic change. if anything with the straight pipes it should have increased a little

 

What year and engine?

 

Not necessarily.

 

Every topic I have read states that removing a clogged cat will increase the MPG.

Its a V8 4.6

 

What year and is it a 2 valve or a 3 valve?

 

I believe its a 2 valve and its a 2007

 

2007 would be a 2 valve. I've asked the moderators to move this to the correct section.

You WILL start throwing P0420 and P0430 codes with no cats.

 

2007 4.6L is a 3-valve model.

 

No sir. The F-150 was only available with the 3 valve 4.6 in model years 2009 and 2010 as an option over the 4.6 2 valve. Before that, it was only available in Explorers and Mustangs.

 

Oops, you are correct. I misread the table in the manual (got distracted by that work stuff that someone wanted me to do). Good catch!

 

with the non fowlers I don't throw the codes but I still have the severely decreased mile per gallon which had started when I had the valve gasket.
but tehr bank 2 errors that are in the picture above have been there since the beginning but were not there before all this trouble.
Im just not sure what to do to correct it and I cant help but wonder if its effecting the MPG.
what is the relearn process you were talking about

 

I'm confused I posted in the 2004 to 2008 section how was it in the wrong area