Start of 95 f150 4x4, 302, block is 93 out of van, heads are off a 88 country squire, flowmaster 44 straight pipe no cats, literally all sensors are new, running 93 firing order, injectors have been soaked in sea foam for at least 24 hrs, prior to install, truck runs great, but I have egr flow low, lean bank 1, airb and aird failure, 8 miles to a gallon, please help I'm stumped

 

Maybe a vacuum leak?

 

The TAB and TAD are connected to switches on the driver's side of the engine, make sure you didn't connect them backwards. Like booba said check for vac leaks, or disconnected lines. BTW do you still have the smog pump?

 

No vacuum leaks that I can tell, will check into tad and tab, thanks

 

And yes I still have smog pump

 

Replaced tad and tab no changes, is it possible I have wrong cam for 95 computer, 93 cam for 95 computer, is it possible to lose that kind of fuel economy with a 3in body lift?