...and he has gone from 9-10 MPG to 21!!! With a trailer even.

the emails went to whoever sent me my invoice i believe it was corey. but anyways it is what it is. i will get a hold of the shop on monday and see if they have anything stored or wrote down. i dont know the #'s. they checked it on stock i know that. if not im just gonna let it go and deal with it. cant afford to take another day off work and drive 200 miles to have my truck looked at and fork over another $100 or more.

I apologize for the disappointment, but for the most part all 7.3L trucks respond the same to similiar changes in tuning. What runs well in one SHOULD run well in the other. What piques my interest here is that there are hundreds of customers running calibrations just like yours with no similar concerns.

Let me know what you come up with.

in stock at idle.
injector control pressure. 548-560psi
manifold pressure 13.02psi 26.5 inhg
waste gate duty cycle 18%

stock under load/ heavy acceleration
injector control pressure 2400-2600psi peak was 2743.11
manifold absolute pressure 22psi 45inhg
fuel pulse width 2.4 msec
wastegate duty cycle 98.8%

no codes before or after stock test

chip on 100hrs load/ heavy acceleration
injector control pressure 2350-2550psi peaked was 2611.24
manifold absolute pressure 29.35psi 49.2inhg
fuel pulse width 2.2msec
wastegate duty cycle 94.3%

when on the 100hrs setting these codes came up while testing.
p1249 p0603 p0340 p1211 p1249 p0603a



the computer i borrowed was a genisis updated with 4.0 obdII. it wouldnt read oil pressure.
not sure if this helps or not. if you need more info let me know i have the computer till tuesday.

See bold/underlined above. The P1211 is normal for a chipped truck and a stock HPO system.

There is one more thing I'd like for you to look at for me. When the injection pressure (ICP) is around 2300 PSI under load, what is the injection pressure regulator (IPR) doing? That value will be in "%" and expressed as duty cycle. If you can (SAFELY!!!), run the truck from 45-80 MPH in 6th gear WOT. Watch the ICP and IPR as well as the pulse width value at that time. Thanks!

By the way, the Genisys happens to be my favorite scanner....well, short of what I know about the Snap-On Verus.

i only got it tested on 100hrs

injector pressure all the way though 45-80 stay between 2000-2300
fuel pulse width started at 3.6 and stopped about halfway and stayed steady on 4.7
manifold pressure started at 20 and at end was 31.23

injector pressure regulator started at 38% and finished at 58%
the injector control pressure stayed within .5% the hole time.

i will test on stock tomorrow.

it was hard testing almost everytime it would through a code and stop recording.
now all these codes in all the testing wouldnt make the engine light come. they were just stored codes.

The 2000-2300 PSI is your problem.
The programming is calling for 2900-3000 PSI in the 80+ HP tunes.....

You're losing a lot of volume and atomization.

fix?
 

i am heading out now to retest just to make sure. its had watching for cops and the road and the computer at the same time.

if this is the problem what is the fix for it. u have obviously done more over the computer than any shop i have taken it to. thanks for getting on this.

the results on the 100 horse were the same. i forgot to let you know the wastegate code and the 1211 come up on every test i floor it. the wastegate percentage stays up till about halfway then drops rapidly to 84.3 and stays there thats about when the code comes. normal?

on stock

injector pressure 1800 by top end 2650.
pulse width 2.7 ended at 3
wastegate stayed at 98.8%
duty cycle 30-end at 38%
injector pressure spike for about 2 seconds a little less at 2694
no codes came up on stock run ran it 3 times it spiked all three times close to that pressure.
when just driving an hit it about 1/4 to 1/2 throttle it on either setting it stays around 2550-2800.