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Who the hell put the stoich for the fuel at 12.92 if you are running 87 octane fuel that is maybe E10 at most.

That is totally wrong.

54-58psi of fuel pressure is totally fine. Adding fuel to a stock truck with a stock tune is just masking a problem, something tells me you still have a vacuum leak somewhere or exhaust leaks from...

I'd buy a lot of stuff if I had a big enough yard to put it on.

Likely it's something that becomes a mismatch between values between two different systems that work together. But that is just a guess as HP Tuners is only able to flash the PCM/TCM and nothing...

Honestly just start with a 5.3 timing table because it's a 5.3 engine.

That tune file still has the MAF working, so you aren't tuning in just speed density for the VE table.

The majority of that log shows the trims are negative, so it's rich and not really lean. I...

Two things I want to say.

What is your fuel system like. Return or returnless? What is your fuel pressure?

And you need larger injectors on a 6.0 with a camshaft that size. It's going to run...

You're fueling must be too rich while cruising if you are fouling spark plugs. Without a data log with a wideband, I can't really see how it's running.

Just where it starts to lean out.

You need to put in the 3 bar MAP sensor settings, disable the rear o2 sensor codes and COT.

Always post the tune you are working with, best way we can help.

In my opinion, running in the 12's on E85 isn't that lean at all. Running 11lbs of boost isn't a ton compared to what others run.

I'd be commanding around 12's in the alcohol table but that's just...

It will be just fine.

Good tune for what though?

Stock vehicle or what is the setup?

All I can really see is that it's a G6 with a 2.4 engine. It must take you forever to repeatedly try to take this thing to 127mph,...

How much power do you plan to make?

The 3 bar sensor should be 312.50 and -11.25 if I remember right. The data needs to be correct for the sensor.

Both logs show pretty lean fuel trims with the 2nd log showing the long terms at +25%.

Could be losing fuel pressure.

My exact question, why would the first thing you do be adding the speed density OS?

All you can really do is just add more timing in the spots that you cruise in, simple as that.

Be aware that a 2002 computer is a P01 and a 2003 computer is a P59, so some of the things you are putting into your 2002 computer may be wrong. The hummer would have been drive by wire and yours is...

Technically all airflow/fueling calculations take that number into account.

So if you left it as a 6.0 but went to a 416 cubic inch motor, you'd be skewing all your numbers to make it right....

Yeah, 100psi won't let the injector work right. See what it's like once it's back down to 58ish.

Whats your fuel pressure?

Those fuel trims aren't doing so good, they look super lean.

Also this tune file is for a 4.8, you'll want to copy over in 5.3 data for cylinder volume, VE tables,...

Just so you know you have the PE enable at 87% throttle and on the last 2 logs I looked at, you never once even hit 87% throttle. That is why it's still showing lean on the wideband.

How about you...

I personally go to around .4500 for shift times at part throttle and go down to .3000 at full throttle. Most shifts end up being around .3500-.4000 with my heavier foot.

Also if it's still on a...

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