k so my '00 XJ Classic with a 4.0 I6 has decided to start bein an absolute pig on gas. I've done nothin to it liftwise and i haven't put big tires on it. Air filter is brand new, fresh oil/filter change, fresh tranny fluid/filter change and it spends most of its time in 2WD. Any input is appreciated.. willing to try anything.

Thanks alot.

Jesse J.

 

new fuel filter might help.. hows your o2 sensor?

 

what are u getting per gallon?

 

yeah what is your MPG? My 91 4.0HO auto 200k miles stock was getting 13-14 city. My 92 lifted 4.0HO got 9.5 city last tank!

 

me too 91 and if i get 14.5 avearge mph im happy.
a 2000 should do a little better but i doubt ull see 20mph unless its all highway.

 

parkerbaco - the fuel filter is in gastank not realy worth it to change unless u kno it is the problem or your changing the fuel pump


and jesse james what are u getting for mpg and when did this start to happen. cherokee dont have good mpg and winter can make them worse

 

it started in decemberish but i've only owned the truck since september so i dunno what it should be around in the winter.
I dunno what the conversion is to mpg kuz i'm from Canada and we decided to screw everythin up by puttin in a b.s. measuring system but i'm using about 17L/100kms. So whatever that works out to. And considerin my dads '04 Grand Cherokee with the 4.7L H.O. V8 with full time 4X4 uses about that i think there is something wrong.

 

? Its not in the tank.....its on frame rail. on mt 91 xj anyways

i know a buddy of mine has a grand with 318 v8 all time 4wheel and he gets just about 20mph