MPG's with 87 economy Tune ?'s

lawrenr2001 · #1 Fri, May 8th, 2009, 11:00 AM

Forgot one stat....I was driving (with cruise controll) 65-70 MPH

Mattyp · #2 Fri, May 8th, 2009, 01:59 PM

So - what I am getting, is that either my programmer didn't upload the custom 87 tune that I got (I think I forgot to mention that before), or that the custom tune isn't working... It seems like you all are getting close to 17 mpg's...

I gave Bill all of the pertinent information - K&N, exhaust and tire size (I pretty much went to 33's) - but I am not seeing any "return on investment"... I was pretty much getting these mpg's before I bought the programmer...

Any thoughts on if there is something that I should change??

Thanks,

***Jackpine*** · #3 Fri, May 8th, 2009, 02:46 PM

Well, you can certainly check to see if the custom tune was uploaded. Look at the display screen and in the upper right corner if you see 1, 2, or 3 there, you have a tune loaded. If you see zero "0", you're at stock.

You can also tell if your tunes are indeed the custom tunes: Go to the main menu on the programmer, select [Diagnostics] -> [Tech Support] -> [Version Info]. In the calibration version, it should read "0.0.xxxx" where the x's are [usually] the same as your serial number. If so, then you have the custom tuned files. If the calibration does not start with "0.0." then the unit has canned tunes, not custom ones.

If you are using custom tunes and you gave Bill the information on tire size, then it becomes a part of your tune and your speed will be correct, as long as you DID NOT open the Custom Options Menu! If you opened that menu, and even if you did not change anything, your Tire Size and possibly Gear Ratio are likely BOTH wrong! You will have to retune and fix them.

Beyond these points, I have no further suggestions. With the bigger tires, do you also have a lift? Both mods will tend to hurt your mileage and you probably cannot get it all back.

- Jack

soutthpaw · #4 Fri, May 8th, 2009, 04:24 PM

I would Loose the K&N.. they suck!! They don't filter squat and let too much crap into the engine.. 2nd problem with any oiled filter is that the oil will bleed off and stick to the intake and the MAF sensor wire... then it gets false readings and causes bad MPG and performance.. You can by a can of Intake MAF sensor cleaner at any auto parts store... I would start with cleaning the intake and changing to a different or even the stock filter and see what happens with your MPG