A219_0E_31_v250.adx, PE not working

[gregs78cam]

I had the same factory settings in my .bin when I set up the Camaro. You can set the delay to zero, or lower the Fast PE Threshold. I think I remember reading that it was done for better mileage, in the heavy duty applications which is what mostly came with the $0E, MotorHomes, Passenger Vans, etc.

[93V8S10]

I don't see how the wiring could be an issue, but I certainly don't know everything.

The problem is the bin, the stock settings are pathetic.

[907 Chevy]

I figured it wasn't the adx as I couldn't even feel PE kick in as I was driving the truck. I'll play around with PE entry settings,but need to get my ve tables dialed in first. It def would explain why my new engine has felt kinda sluggish.

[JeepsAndGuns]

I will be busy sat morning, but I plan on tinkering with this sat afternoon. So its almost time to play...lol

So in the meantime, in order to better understand whats going on here, and make better judgements about what needs to be done. Can someone explain in a little better detail the parameters for PE. Such as regular PE, and this "fast" PE your talking about. What is fast PE and what dictates its use over regular PE. Also, explain the delay. Whats its use and purpose? I understand what PE is (richens the mixture, and adds a little timing) But when and where it should come into play is the grey area.
What would be the optimal settings for PE? Is it normally based on TPS or MAP, or both?
Would the setting be something (simply for example, or conversational purposes) It would enter PE anytime the TPS is over 50%, and then the delay timer comes into play, so anytime its held over 50% tps for 5 seconds, it knows your wanting to burn rubber and goes into PE? And the delay timer is so its not constantly kicking it on if your say shifting gears and its only at that TPS % for a second or two?

[93V8S10]

I don't really understand how it all works together well enough to explain, but your explanation seems to be about right. With my truck I took the simple rout and set the PE Delay to 0.0 and lowered the tables to 45% TPS. For a daily driver I'd probably set it to 65% or so.

I've started looking at the code some to see if I can get a better understanding of how all these parameters fit together.

[EagleMark]

Anyone have an $OE datalog I can use? I've been setting up some $OE ADX and XDF for my kids $OE system we are going to install on his IH 345 .020 over Isky cam Balanced engine we built. Would like to check data Tracing...

since this topic came up I looked through PE and here's what I did so far to PE stuff...
PE delay to 1 second from 70
RPM Difference to Bypass PE Delay to 10 from 125
RPM to Bypass PE Delay to 1450 from 4300

Not sure how "Base PE AFR" and "PE Slew Multiplier" work? Since in tables there is a PE AFR...

Since it's a heavy truck and will be towing his rock crawler I'm trying to leave most things set conservative. Like one setting to enter PE was TPS 10.9 percent? I was going to increase that. But that is no where near what tables say to enter PE which are 60 to 90 % TPS which would be about right? Maybe this TPS to enter PE at 10.9 % was to start timer, but if you shift gears and go below 10.9% it starts again? Even in an Auto Trans being above 10.9% TPS for 70 seconds you would be past the fuel cutoff of 98 MPH before ever getting qualifiers met to enter PE...

[gregs78cam]

If I had my laptop here I could go over all of it, but I don't remember all of the constants, and tables that are involved.

Mark, you can go over to my project thread and get a couple of my datalogs.

[EagleMark]

No internet at home yet?

[gregs78cam]

Actually yes we got it back on this morning, but I am at work right now.

[EagleMark]

It'll be good to see you back!

[1project2many]

It helps to remember OE tuning priority. 1) Emissions, 2) Economy, 3) Warranty, and 4) Driver experience. $42 has a PE delay factor and many of the truck cals had a large delay which was only bypassed if RPM went above 4500 or so such as during a hard downshift. Fuel economy may be part of the PE delay factor but emissions compliance and catalytic converter operation are major players. When the AFR gets rich HC and CO increase, O2 decreases, and the cat tends to coold down and stop working. Lower than normal AFR plus a non reacting cat meant bad marks at the EPA emissions test center. The code and calibration are specifically written and adjusted to allow WOT operation during testing without going into open loop or cooling the cat.

Don't think GM isn't above fooling with the EPA. The reason highway lean cruise mode wasn't enabled in these pcm's is that cals were originally set up to stay out of lean cruise during EPA pollution testing but would enter lean mode during mileage testing and real world driving. Once the EPA realized what was up GM got into trouble for having an emissions defeating device installed and ended up disabling it in all subsequent cals where the code is present.

As an aside, it's worth noting that cat overemp protection code can prevent continuous operation of lean cruise mode. If the model determines cat temp exceeds safe limits it can (depending on the code) force 14.7:1 AFR and / or adjust timing to cool the converter and prevent meltdown.

Remember: Emissions, Economy, Warranty, Driver Experience.

[JeepsAndGuns]

Does the 7427 0E have highway lean in it? Or is that only on the 7747 42 bins?
Also, mine does not have a cat on it, so are here any cat parameters I should disable?

[93V8S10]

Uncheck the "Catalytic Converter Overheat Protection" flag.

[JeepsAndGuns]

I looked for that "Catalytic Converter Overheat Protection" flag but did not see it anywhere under flags?

I had time today to change the settings and give it a try. I set the delay to zero, and then all the PE to 50% throttle, and all fast PE to 60% throttle.

Took it for a drive and the PE icon will now say active when I push it past 50% throttle. Does seem to pull just a little better too.
Seems pretty good as is, would there be any reason to change these settings? I'm thinking mabey up the % just a little more in the higher rpm parts of the tables, that way if I am driving at higher speeds (I have no overdrive, 70mph I am running 3100rpm) it wont be wanting to go into PE as easy. I will probably base those settings off what tps% I am at at those speeds. It will just take some more time and logging.

[EagleMark]

I looked for that "Catalytic Converter Overheat Protection" flag but did not see it anywhere under flags?

Flags, first category air fuel mode words about fourth from bottom "Catalytic Converter Overheat Protection " in $OE anyway, forget if your useing $OE or $OD?