hey guys ineed some help. last night i filled my gas tank up and i am only getting like 13mpg. what could cause this? i just changed the spark plugs a month ago. what else give you bad gas milege? please ask me questions if i am being too vague.

 

Mass Air Flow or MAF, do u have and CEL or Check Engine Lights on

 

my maf at idle is 4.5 and at WOT it is 155, i do not have a cel

 

hummmm. lead foot

 

no i dont drive fast. im not a grandpa but still. what should i be getting? i use to get about 19 in the city so something is wrong

 

u should be getting much more, with all my mods i still get about 24-25mpg maybe less

 

i have VAG so what should i look for in the blocks? oxygen sensors? maf? engine load? what affects MPG etc... what should the numbers be?