Dirty MAF or Bad 02's
 

Ok guys the car is a 1999 z28 m6, my problem is i popped the code that both my front 02s are bad. i was at wot when the code came up if that is at all important and i was reading that it may be a dirty maf but heres my reason for not thinking it is, my gas mileage is HORRIBLE even with 100% conservative driving i get about 160 miles to a full tank and when i first bought the car i was getting something around the 280 mark with mixed driving and ripping around. So basically i need opinions or personal expierence of what it might be. Thanks in advance guys i need all the help i can get before i drop the money on the 02's.

Time for a tune.

you could go out and buy a can of MAF cleaner. its like carb cleaner and spray that on the maf wires (gently)

what mods do you have done?

you may wanna lookinto a tune too

-brandon

where in pa are you?

stock besides the exhaust and im down in york county, but would the maf being dirty kill the mpg that badly?

possibly, cause it would be reading false air flow if its real dirty. wont hurt to try it, also do PM (preventitive maintence) replace the fuel filter,try throwing in injector cleaner into the fuel tank,air filter

see what the small things yield first

-brandon

Do you have longtubes?

alright demonic thanks for the help bud, sick car btw. and tyler no longtubes yet haha.

thanks

yeah start w/ the lil stuff first its easy and cheap....also try to get the spark plugs replaced
they could be shot as well....but thats gonna be a major PITA w/ the stock manifolds on

-brandon