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Change the PE enable MAP setting back to the OEM (15 kPa) value as well.

If you are using the MAF, put the values back to stock and start over as they are totally screwed up. They should still...

After a quick look at the tune ......

Also disble the the master post O2 test and put all the DTC/SES settings back to stock for the O2s and catalyst. Based on my experience I suspect there is a...

Several questions (I haven't looked at the posted files).
Are you running the car in open loop only?

Speed density tune or MAF?

For WOT AFR tuning with a WB try setting the IVT gain table from...

Check to see if the truck is using the most up to date GM OS calibration. GM periodically updates OS's for any number of reasons and I believe (if memory serves) the problem you are experiencing...

It was my understanding the TCS patch was so that traction control was still available in SD mode and to prevent the invalid torque signal response (max line pressure commanded, etc.).

I'm not...

I know I'm on a rant .......

Variable #5: Is the response of OEM O2s and WB sensor the same to differing concentrations of EtOH? If not, then how different are they?

The other variable that drives me nuts is that every station I've encountered selling E10 states "the fuel may contain up to 10% ethanol"

All this makes it virtually impossible to know precisely...

The base AFR table on the 05'-06' GTOs (unlike many other calibrations) indicates the ECM does not have the ability to adjust the commanded AFR based on ethanol concentration. Funny that GM does not...

Post a log file. I'm not sure what you mean by the gauge goes back to moving around?

You have disabled COT. Do you still have the cats?

Without more information I'm guessing some of the...

Line pressure vs FM

Conditions for cold start

Greg, any possibility of having an online course for those of us too busy to travel?

BTW: I have your advanced engine mgmt tuning book. Very nice addition to my library.

FYI

Part throttle shift points (mph vs %TPS) with the E40 ECM has always been a little vague for me (TPS% or ETC% doesn't line up very precisely with the mph the car is shifting).

Recently I...

Several options come to mind.

1. The bank 2 pre-cat O2 sensor can actually be reached from inside the engine compartment (facing the car with the hood open it's on the left just below the...

That's a great idea ........

Here is some info from tech support at NGK.

The averaging is at 250 milliseconds Hope this helps, thank you.

Regards,

Brandon Peeler

Technical Support Representative

There is a GM bulletin on this.

http://www.hptuners.com/forum/showthread.php?t=19761

Only disabling the master post O2 test does not prevent P0420/430 DTCs (at least on the E40 GTOs)

Based on this it appears the purpose of the master post O2 test is to monitor the performance of...

Thanks Bill,

I appreciate your candor. I've been digging around on the site, my Helms manual, etc. and I can't quite figure out the exact function either. If I find anything I'll post the info.

Nice link to a PDF article on GM PWM TCCs. The PDF is too big to attach.

http://www.gassavers.org/showthread.php?t=10152

So no one can explain the difference between and/or relationship between these two tests?

Disabling the post O2 test eliminates the low catalyst efficiency DTC. What then, is the purpose of the...

Can anyone explain/clarify the difference between these two tests?

The post cat O2s are obviously to monitor catalyst efficiency.

Is the post O2 test simply to verify these O2s are being...

Post your current hpt file and a list of any other mods

I posted a tune and a log file for you to look at, told you have a nice car (so take your time before making changes) and you got mad.

Dude, you gotta relax, nobody is trying to insult you. I...

Active DC Min
Trailblazer SS: 30%
Thunder Ute SS: 40%

Or maybe these differences relect different types of ABS and/or TC systems? My impression is that increasing these values would raise the...

I'm wondering if the Active DC Min could also be adjusted. Appears to be set at 24% for LS2 vettes and GTOs. However, the value is higher on some of the Holden vehicles and I believe on the...