I think I need my calibrations looked at

[PhqChevys]

Well, I decided to update and reprogram during my lunch brake. I've only put about 10 miles (maybe) on it and have only tried the 87 performance tune, so far. The engine seems to idle much smoother. Before it had kind of a "lobe" to it. It wasn't a bad at all, just noticeable, the engine would slightly rock the truck when stopped at a red light, it no longer does this...it's nice a smooth. So far, the sputtering problem has not occurred, it runs very much like the Edge canned tunes did. My only concern is if you leaned out the A/F ratio any. The reason why I ask is in the short amount of time I was able to drive it, it says that its getting 18.2 MPG, and that was with my playing with it and running it hard, good amount of WOT and downshifting it (I was trying see if it would sputter) when coming up on red light and such. I do know my truck very well and my old custom tunes very well and it has never showed me 18.2 MPG before, I guess I just want to make sure that it's not running lean. Besides for that one concern, so far so good... It's running great! I'll get some more road time with it, and try out the towing tune as well. I'll try out the 93 tune after I use up my tank of 87. I'll keep you posted!

[cleatus12r]

Originally Posted by PhqChevys

So far, the sputtering problem has not occurred, it runs very much like the Edge canned tunes did. My only concern is if you leaned out the A/F ratio any. The reason why I ask is in the short amount of time I was able to drive it, it says that its getting 18.2 MPG

I did change the A/F ratio under load just a little bit and I did make it leaner but it's still within stock boundaries. Bill had initially set it up pretty rich and I have found that with the last couple tunes that I fixed. I also made some changes to the ignition timing and it's more aggressive than Edge's by a long shot.

Enjoy!

[PhqChevys]

Originally Posted by cleatus12r

I did change the A/F ratio under load just a little bit and I did make it leaner but it's still within stock boundaries. Bill had initially set it up pretty rich and I have found that with the last couple tunes that I fixed. I also made some changes to the ignition timing and it's more aggressive than Edge's by a long shot.

Enjoy!

Come to think of it, my exhaust tip does have a bit of black soot on it all the time...

Well, I'm defiantly happy with 18.2 MPG (standing on it) over my previous 14-15 MPG (highway). Maybe Bill had it richer due to the cold air intake that's on the truck...i couldn't tell ya. Just as long as your adjustments and leaning it up a bit is still safe and won't destroy my engine then, then I'm all for it! She runs like a champ!

[PhqChevys]

Update:

Now that the computer has had a chance to "learn" with the 87 performance tune, my MPG have settled to about 14 or so. Yesterday I loaded the towing tune and the computer is still in the "learning" stage, but so far everything seems good. It has not done any sputtering in either tune so far. I still have about 1/2 tank (I have the big tank, I think it's 35 gal) of 87 left, once I burn it up, I'll fill up with some 93 and give that tune a go...

[BigSur]

Looking good. I'd LOVE for you to run the rest of that tank out on the 87 performance tune and then give us another update. If no sputtering....might be my turn

[cleatus12r]

Cool.

[Longshot270]

That would be good if the sputtering is finally figured out.

Don't bank on that instant/average economy readout. The reason you had an average of 18 mpg while hot rodding is because when you go WOT you spend a few seconds at 5 mpg, then it takes you twice as long to roll back to your original speed, all the while accumulating 40 mpg readings. When you average them the 40 has more pull than the 5 because it having a larger value and the fact that there are more readings being averaged in.

Also that 12.4 battery voltage worries me if the engine is running.

[Jackpine]

Originally Posted by Longshot270

That would be good if the sputtering is finally figured out.

Don't bank on that instant/average economy readout. The reason you had an average of 18 mpg while hot rodding is because when you go WOT you spend a few seconds at 5 mpg, then it takes you twice as long to roll back to your original speed, all the while accumulating 40 mpg readings. When you average them the 40 has more pull than the 5 because it having a larger value and the fact that there are more readings being averaged in.

Also that 12.4 battery voltage worries me if the engine is running.

YES! 12.4 Volts means your battery is NOT being charged at all! It should normally be above 13.5 - depending on the load, probably in the 13.9-14.1 range.

- Jack

[BigSur]

Originally Posted by PhqChevys

Update:

Now that the computer has had a chance to "learn" with the 87 performance tune, my MPG have settled to about 14 or so. Yesterday I loaded the towing tune and the computer is still in the "learning" stage, but so far everything seems good. It has not done any sputtering in either tune so far. I still have about 1/2 tank (I have the big tank, I think it's 35 gal) of 87 left, once I burn it up, I'll fill up with some 93 and give that tune a go...

Can we get another update? How's things lookin so far bud??

[PhqChevys]

Update:

I have now had a chance to run all 3 of the tunes, and I happy to say it has not sputtered once! The truck has been running wonderfully. Cody, I believe you have solved the sputtering problem, at least for my truck... And as for the MPG, after more miles on it, it has averaged out to being about the same as with Bills tunes... 12-13 city, 15-16 hwy. Ohh, and as for my battery voltage in that picture, the truck was not running when I took the picture. When it's running it's about 14.1v or so...

Thank You Cody!!!

I'll keep you guys up to date if any sputtering comes up, but I think the tunes are good to go!