Possible boost leak

[mkinnunen]

Could somebody please review this log for anything obvious. I am getting 9 MPG towing #13000 fifth wheel. No smoke, no engine codes just horrible mileage. 60mph-70mph towing in 5th or 6th doesn

[Tommy ashley]

What file app can I get to open these files on iphone

[ScarabEpic22]

What file app can I get to open these files on iphone

None, EFILive is Windows only. You can do some minor switching of DSP tunes on certain applications on Android only.

[GMC-2002-Dmax]

Could somebody please review this log for anything obvious. I am getting 9 MPG towing #13000 fifth wheel. No smoke, no engine codes just horrible mileage. 60mph-70mph towing in 5th or 6th doesn

That is expected mileage towing depending on speed and shape/type of trailer.

9-12 mpg is all you can expect towing that weight.

[mkinnunen]

I would like 12 MPG, since i can expect that, what should i do to improve what i am getting?

[GMC-2002-Dmax]

I would like 12 MPG, since i can expect that, what should i do to improve what i am getting?

Driver slower, speed kills MPG, just because you expect or want a given fuel mileage does not mean you can have it.

Trailer design, towing while a head wind fights you, towing grades.........be happy its not a gasser.

I have had a Duramax since 2002, the best I got towing my 10K 24/ft V-Nose was 11.6, it got as bad as 9.9 in certain conditions.

Keep it at 62-65 mph, anything over that..........kiss fuel mileage BYE, BYE

[mkinnunen]

But even at 60, I get 9 mpg, so again your "advise" of keeping between 62-65 holds no new usable information, My gasser gets 6-9 mpg pulling the same trailer. Someday i'll find what is the issue and i will report back, or if after all the tuning options have been explored and all the hard parts have been replaced i'll concede that my truck just gets 9 mpg and it is what it is.

Thanks everybody for your input.

[Bdirtymax]

Looking at the log, it seems you have low air flow across your MAF for some reason. You have a max of 47.83 lb/min at 3229 RPM. Should be 60+ lb/min from my personal experience. The boost is following desired within about 1psi. Not sure why your vanes are closed so much most of the time. It's averaging over 70% throughout the log. Is this a tune you are working on yourself?