I have a 01 zr2 blazer and it seems as tho my gas mileage is getting extremely bad.....It costs about $80 to fill from empty and that lasts anywhere from 300km/tank (normal driving) to 370km/tank (grandma driving)....I've done plugs,cap,rotor.....how in the hell do i get better mileage?

 

Wow, gas sure must be expensive up there. You have not told us much, though. Have you actually computed your mpg? That would be the place to start.

 

two things clean your egr and make sure your front end is disengaged the vaccum switch goes bad on the transfer case and pulls vac even in 2wd milege will go from 18 to 12 and you almost cant feel it at all driving

 

Its a ZR2. First off so it not gonna get the same as the regular blazers. Could have something to do with your "Tuning". The stock MAF has nothing wrong with it, True duals have an effect if they are in fact true duals. Are you tuned for more power? or MPG?

Need alot more info to tell you whats wrong. My 03 ZR2 gets (on board compass) 15 AVG.

 

wow that sucks, but I would check what has been mentioned above. It costs me around $40 to fill my 84 and I get somewhere around 15mpg.

 

well im back to stock tuning....and still getting the worst mileage....calculated it, and im getting 21.4 litres per 100km's.....

 

Which equals 11mpg.

 

Any SES codes? Could be malfunctioning O2 sensors. Maybe running REALLY rich. I'm no expert tho. Just pointing out some frequent causes.

 

How would you ensure this?

 

maybe you need your spider injectors fixed