NO PE Commanded CL active, not switching to OL ACCEL/DECEL

[asb2106]

If someone could please advise.

I have a 2001 suburban 2500 6.0L / 4l80 that I am working on. Completely stock. I usually like to tweak PE a little on the stock setups, mix in a little trans numbers and i prefer the response etc i get from it.

While working on this suburban, I for the life of me cannot get it to use PE, and i cannot figure out why.

When working on my silverado, I can command @ 40% throttle, and itll do exaclty the ratio i requested. In scanner it will change from CL to OL ACCEL/DECEL when over 40% tps. and return to CL when back under 40%

On the suburban, with the PE settings set for 40% throttle and 1.1 to 1.25 PE command requests, it sticks SOLID at 14.68 the entire time and never leaves CL as the silverado does.

So i figured i would try and disable CL, by setting temps for ECT to 225, with the intent of it never seeing CL, and in turn the system stays in OL - NOT READY.

Im hoping theres something ive overlooked. Ive tinkered with a few 4.8/5.3s but never these 6.0s and im hoping its just something Ive missed.

Thanks very much for taking the time to read.

[5FDP]

Post tune.

Likely something simple.

[schpenxel]

Post tune

Maybe even a log

[asb2106]

Post tune

Maybe even a log

01 2500 burb 0.05.hpt

burb 0.005 log1.hpl

Thanks!!

[5FDP]

You have a 60sec time delay as well as a 5,500 rpm delay for PE, that is the reason you never see PE.

Remove the 60sec time delay and set the RPM delay to 2,000rpm.

You must be in advanced view to see every table. Edit > view > advanced.


Also you may not be able to get away with so much timing, 28 degrees is kind of alot on a bone stock 6.0.

[schpenxel]

Set enrichment ramp in to 1

Delay RPM to 2000

and delay to 0 seconds

Try that

edit--I'm going to have to start deleting your posts when you beat me, lol ^

[asb2106]

.002 GOOD PULLS!.hpl

Heres one of my good silverado tunes that do well for me

Really appreciate the input and advice. Very much a beginner here

[asb2106]

You have a 60sec time delay as well as a 5,500 rpm delay for PE, that is the reason you never see PE.

Remove the 60sec time delay and set the RPM delay to 2,000rpm.

You must be in advanced view to see every table. Edit > view > advanced.


Also you may not be able to get away with so much timing, 28 degrees is kind of alot on a bone stock 6.0.

ah advanced tables, i pull back timing too, thank you!

[5FDP]

Set enrichment ramp in to 1

Delay RPM to 2000

and delay to 0 seconds

Try that

edit--I'm going to have to start deleting your posts when you beat me, lol ^

I've got that quick trigger or that I have nothing else to do LOL.

[asb2106]

I've got that quick trigger or that I have nothing else to do LOL.

You guys are awesome. Thanks so much.

I feel silly missing that. My mechanic is tearing me a new one.

[asb2106]

so this one has me confused, i replaced my ignition tables with the stock ones, to be safe, and the numbers are significantly lower, yet check out the charts i am getting.

this is the .005 log that had the 28 degrees set.
.005.PNG

this is the .006 that i replaced with stock timing (PE works great now too)
.006.PNG

Am i reading this wrong, or is it somehow using more advance with the stock numbers, I mean where 28 was previously, its now like 10-14.

[schpenxel]

The units are totally different so it's not easy to compare like that. The row axis you're using is in units of MAP but the high octane timing table is based on cylinder airmass (g/cyl)

Just doing some quick looking though it does look like something else is pulling some timing at the high end. You aren't logging hardly anything though so I can't tell what. Could be burst KR, could be knock, could be any number of IAT or ECT adders, torque management.. all kinds of stuff

Also comparing min vs. max for the higher RPM timing areas it's varying 5-6*

[asb2106]

The units are totally different so it's not easy to compare like that. The row axis you're using is in units of MAP but the high octane timing table is based on cylinder airmass (g/cyl)

Just doing some quick looking though it does look like something else is pulling some timing at the high end. You aren't logging hardly anything though so I can't tell what. Could be burst KR, could be knock, could be any number of IAT or ECT adders, torque management.. all kinds of stuff

Also comparing min vs. max for the higher RPM timing areas it's varying 5-6*

Do you have a layout you could share that you recommend? something I can pull a log on and share my logs?

IAT or ECT i did not mess with. Torque management i did a little but i thought i removed TM.

This help is SO greatly appreciated. Im quite certain im more on the lines of dangerous than safe at this point, and I just want to make sure I dont destroy my engine.

[schpenxel]

You have to learn how to make graphs

It's literally one of the most powerful things that HPT can do and once you understand it isn't hard at all

Basically you need to figure out 3 things.

1. What do you want the column axis to be based on?
2. What do you want the row axis to be based on?
3. What do you want graphed?

In this case you want #1 and #2 to line up with the spark table in the tune, so column axis would be engine speed (RPM) and row axis would be cylinder airmass.

#3 would be ignition timing since that's what you're wanting to see

It will look something like this when finished

asb.JPG

[asb2106]

Ok, I think I see where you are going. Basically the graph now reflects what variables the editor uses. Giving me a more 1:1 view.

What I am doing now is going back to a stock tune, to eliminate any quirks i might of had in there. I am adding my PE back in and my trans numbers. Going to leave everything else to same, and pull a log on lunch today.

For e10 gas, is it recommended to change stoich to 14.1 roughly, or keep it at 14.68?

[schpenxel]

For most places it's pretty much 10% E year round, in which case it doesn't really matter. I'd leave it at 14.68 because it will make more sense to what you're used to. 12:1 with stoich being 14.68 and 12:1 with stoich being 14.1 are different, which will make your head hurt.