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Red label LSA/LS9

Except for the fact it's at least partially incorrect. More camshaft equals less vacuum at lower engine speeds. Always.

Never mind. I just read it in that jumbled together paragraph.

Where did he say it had a FAST intake on it?

Nothing about that data log screams vacuum leak to me. The dead giveaway is usually the MAF Hz. Even if you "tune around" a vacuum leak it will idle...

Your pid list is terrible. Use the attached channel list for data logging. If you don't know how, search how to download, save and open a channel list.

Bank 1 fuel trims are pegged positive which...

Well, judging by the wealth of information you've provided, looks like it has split fuel trims. If the ONLY modification to the vehicle is a BTR stage 2 cam, looks like you has some problems.

You...

Wow that thing makes ALOT of vacuum LOL

Agreed ^^^ No reason to use anything but AC Delco or GM OEM.

That idle roll at the end of the log looks like it doesn't know it's idling. I see your TPS voltage but no TPS %. Add that and log it again.

Also, you have it in "maf only" mode and these PCMs...

Closed loop has nothing to do with airflow. Dynamic airflow determines when the PCM is operating in "Hybrid" mode or "MAF only". Has nothing to do with closed loop.

I think that goes without saying. I was referring to degreeing the cam. Checking PR length is a quick no brainer as you're installing them.

FYI, swap is spelled with an A.

I'll bookmark that page. I have not dealt with them before.

146517

Codes....

As for the harness I think everyone is still making them like we're still on GEN3 PCMs and they don't have a lot of stuff that's needed on the later GEN4 and now GEN5 stuff.

One of your torque source pids should tell you if it's in idle mode or not. That will tell you if it's related to the missing brake pedal input.

30 seconds of run time is not near long enough to make a consensus. Engine isn't up to operating temp.

Put it back in closed loop and use the fuel trims to dial it in. Run it for MUCH longer...

I don't check anything that's not a higher HP engine that I feel REQUIRES added attention. And even those I'll rarely move. It's more about making sure the valvetrain is perfect.

Changing a cams...

Unless you're experienced in degreeing camshafts, and have checker springs, degree wheel and dial indicator, it's a waste of time. Chances are you won't do it correctly if it's your first time...

Not sure how you misunderstood. It's pretty clear what I typed out.

It has a bunch of codes including ambient air temp and brake pedal position and the brake pedal code is current. Wonder if that's causing any additional airflow like an off idle adder, throttle...

One of the reasons to post a tune file in situations like this is so we know what we're dealing with. "6.0 4L80e combo" covers a lot of year/make/models.

Might want to post this over in the trans...

Crank relearn has nothing to do with it running rough.

That's exactly how the system works. Not sure how that's a rip off.



I think that's a fantastic idea. Go spend a grand on an aftermarket ECU and another few grand trying to get it to play nice...

All 3 of these files have max pressure enabled. So I think you're incorrect in your statement. Your own explanation says so.


146504
146505
146506

The exact way you describe the situation in the paragraph I quoted is caused by NOT turning off the max line pressure. Read that paragraph again. That tells anyone who does this on the regular that...