I am absolutely stumped. My gas milage is slowly decreasing over the past month and a half ( not that it already wasn't bad enough ) and i have no idea why.

- im not driving hard
-checked the airfilter
-no gas leaks
-using the same gas

i have timing adjuster,underdrives,longtubes,drgas with cats, and packs if it matters

i havent gotten a tune after my longtubes would that help at all?

please help its gettin worse

thanx guys

 

what were you getting, and what are you getting?

maybe you should take it in for a diagnostic check.

 

i was gettin 17-18 and now its down to 14-15 which is pretty big considering its not good to begin with

 

thats a big drop. and if its continually getting worse i think you have a problem that needs to be professionaly diagnosed. sorry. i'd start with checking the plugs and coil packs before you took it in.

 

thanx i though of spark plugs but coil packs slipped my mind

 

Check those coil packs and wires. Perhaps an exhaust leak??? Go get a diagnostic ran on it. Thats a very big drop 17% of your MPG is a big problem....