my truck has gone crazy, its been going 10mpg, i never beat it all. always cruising at 6th gear. i really dont know where to take it to here in Houston. my mods are in my sig.

 

Either you have a crappy tune, bad 02 sensor(s) or a sensor somewhere else taking a poop.

 

something has to be way off, that truck should get almost 30mpg cruising in 6th.

 

both my sensors are working correctly but i dont know what the problem maybe.

 

no check engine light?

Do you have access to a scanner of some sort to see if you can spot the culprit? has it been running poorly?

 

talk to wheatley hes the **** he will help u...

 

Just a thought, my map sensor went bad and the truck pretty much ran fine but i was avg about 12 mpg, it was terrible. But 45 dollars later, all was well i even changed it infront of auto zone.

Jon

 

wheatley says the MAF is working fine, the truck has no power and no boost. checked all the piping today, everything is good, it doesnt even have a tailpipe or a muffler so that should help the turbo a little, it used to hit full boost right around 3000RPM.

 

That is horrible mileage,Something has to be goin on.Truck runs good and yes the MAF is fine but something is up with that mileage,and no it is not in the tune.LOL

 

Like slowrolin93 said above, check your MAP sensor, which is different from your MAF sensor. If your MAP sensor is bad you would not see the correct vaccum or boost signal to the computer, and that would cause your truck to run in the wrong portion of the VE table,, that is if you are tuned for boost. This could explain quite a few of your problems. I.E., loss of power due to computer not commanding P.E. mode due to incorrect MAP sensor signal.

Check it out, let us know what you come up with. Good luck.