Im looking at burning a new chip for my daily driver S-10, I would like to get more MPG out of it, what exactly would i need to change to get better MPG?

 

Is it stock? If so, is it getting worse than anticipated gas milage? If so, don't burn a new chip. Instead, fix the mechanical side of things (tune-up, vacuum leaks, etc). If it's stock and getting the designed MPG, then leave it alone. Messing with it for economy probably won't get you much.

 

like Mangus said, first everything has to be in good condition, if you have problems then a chip is a waste of time. chip tuning will not fix mechanical or electrical problems.

it also depends on how good the chip you have now is.
each motor is a little different, some like a little more timing, some like a little less timing, some like a little more fuel & other like a little less fuel. what works great on 1 motor may not work as good on another identically built motor. thats where doing lots of data logging & making 1 small change at a time comes in at.

can you pick up some MPG with tuning? almost certainly, if you take the time to read the stickies here, use the search feature, & take lots of notes on what works & what doesn't work.
you may also pick up some performance with a custom chip you made yourself.

can you damage your motor by doing something wrong in the chip, YES, very quickly & very easily.

would it be worth the trouble & expense? first you have to get the equipment, then you have to learn how to use it, there is a very heavy learning curve to chip burning, i read pretty much every sticky at least 2 times, some i read 3 or 4 times before i did my first chip. even after about 2 years of tuning i still go back & read some of them again.

 

The engine runs great theres no problerm there, i was just looking to tune for a little better milage. I already have a pocket programer and have burned a few chips for my TPI blazer. The truck i want to burn a chip for is all stock, i thought that there might be some room for improvment with the stock chip as to fuel milage running a little leaner becasue i removed the cat

 

in that case i see no reason not to try.
get the files you need for that ECM & look to see if it has highway mode in it.

 

I disagree. I greatly increased the mileage of my TPI L98 (when it was basically stock and had a functioning EGR). I increased my highway mileage from approximately 23.5 US mpgs to 30 US mpgs.

I did this by invoking Highway Mode and running excess of 17:1 on the highway, making the EGR operate longer and quicker and increasing the spark advance (to compensate for the sluggish throttle that can occur with a lean mixture and using the EGR).

I also ran over 50,000 miles with the catalytic convertors and never had any problems with either my convertors or getting through emissions (at the time).

When I did this, I heard every "prediction of disaster" from "you'll burn out your pistons, burn out your catalytic converer, and you won't get any noticeable increase in gas mileage". None of these predictions occurred. I also tried the bin on a friend's TPI L98 and he obtained similar results.

Will you experience the same improvements as I did? Maybe yes, maybe no - your vehicle is different and may not respond to those changes the same (or even be capable of Highway Mode - I am not familiar with your calibration). But, unless you try, you'll never know for certain. Do not be afraid to experiment - you'll find out very quickly if HM is doing anything for you. And if it isn't, then just go back to stock.

 

I have worked with many TBI vehicles and there is always HP/TQ/Fuel economy left on the table. You can pick up almost 20 FWHP on a 305/350 TBI, just by reprograming the ECM. You can also pick up 3-5 MPG highway pretty easily.

 

did the CPI have the highway mode built into the bin file? How exactly do you turn highway mode on? Is it a constant that you just click on or more in depth than that?