ok well i was getting good gas milage after i did a tune up (plugs and wires) but then one night i was driving and my egr tube busted off the header well i fixed it after some head achs and noticed my mpg dropped i was lucky if i could get 60 miles out a half a tank give or take a few so i changed my 02 sensor not sure if it worked yet any more input could my egr valve be bad it is origianl or maybe something else truck was ran for about a week with out that tube

 

well has gotten alittle better with some injecter cleaner anymore tips

 

Take off the vacuum line to the EGR at idle and note if there is a difference in how the truck runs.

Adrianspeeder

 

i have dont it before doesnt seem like the truck runs any different i do remember after i ran it with the hose on i would shut the truck off and hear a really quiet hiss so i pulled the line on the egr valve and it psh alittle does that mean anything?