No PE with 2006 Vortec...Please Help

[KAZ MotorSports]

Hey guys,

This is my first later model Vortec tune and I am having an issue.

The big problem is there is no drop in A/F Ratio. I have tried the PE tip in TPS, PE based on RPM, PE based on ECT, etc and she lays at 14.7 all the way across the RPM no matter the load on my dyno.

What the hell am I missing here? :confused:

The OS is 12587811 and the Cal is 12587806.

If you need me to send the cal file let me know.

Also the customer had a SuperChips on there previously and it does the same thing. Also the same thing with the factory calibration as well.

Thanks in advance guys!
-Kenny

[dc_justin]

This is a common problem. Of the 2006s I've done, I've only encountered this on two recent 2500HD trucks, not on any of the others. One of them wouldn't go into PE at first, but on a subsequent run it had no problems. The other still won't go into PE.

[KAZ MotorSports]

Back to back runs on the dyno to get heat in the motor and no change.

I am going to try a few things tomorrow...wish me luck. :help2:

[lsxtech]

Make sure there is no pe delay, alot of trucks have a delay for pe mode ck B3608 should be 0

[dc_justin]

It's not the PE delay. Some other parameter/ function is prohibiting them from entering PE at times.

[lsxtech]

Are you logging commanded AFR?

[KAZ MotorSports]

Are you logging commanded AFR?

Yes...it was 14.68 from start to finish. Never left Closed Loop.

I found the issue. I need to go back through my changes to find the actual point in which it would see commanded OL fuel.

Went back to the factory tune and it again would not leave Closed Loop.

Sorry guys, but I am incredibly busy or I would post it up right now...but I will share my findings as soon as I can.

Bare with me.

-Kenny

[tblu92]

If you do a search on this same exact subject--you'll find that about a year ago i encountered the same problem---Long story short--It was never resolved and i never did figure it out--Even with the new V2 and the new 7.5 software and downloads it still never shows that the PE mode is working--
I tip toed around the issue with my customer---not telling him exactly what was happening because he would never understand--but he did tell me the truck is running great and has a ton of more power--So i have to assume it's working but just not registering on the flashscan

[dc_justin]

I have to think that the scan tool is showing correctly. I have one log from a customer showing PE not enabling (2006 LQ4 2500HD), then the next log shows it enabling. All of the signs pointed to the scan tool registering properly (Commanded AFR, NBO2 voltage, spark advance).

[joecar]

In these cases it might be best to setup B3605 CFOL to give the suitable enrichment in the last 3 or 4 columns (i.e. as MAP ramps to it's WOT value).

[KAZ MotorSports]

In these cases it might be best to setup B3605 CFOL to give the suitable enrichment in the last 3 or 4 columns (i.e. as MAP ramps to it's WOT value).

Commanded Fuel Open Loop would be nice if it was switching to Open Loop.

[joecar]

Commanded Fuel Open Loop would be nice if it was switching to Open Loop.Oh, it's not going OL also... hmmm... that's bad.

[joecar]

I'm wondering if a different OS should be used...

[dc_justin]

I'm wondering if a different OS should be used...

Not that either. Same OS in a different but equal truck works just fine.

[KAZ MotorSports]

First thing I did was clean the MAF out. The customer had an AFE oiled filter on the truck so I figured it would be a good place to start although the airflow was not twitchy in the datalog.

Ok...I have a few minutes to share what I did and something along the way allowed OL and a perfect 13.5:1 AFR. When switched back with the stock tune or reloading the SuperChips calibration it would hold Closed Loop and 14.7 AFR on the wideband all the way through the load and RPM sweep.

Normal PE Mode Enable {B3616} = My value - 70% (higher value would not change AFR although TPS showed the proper %) Factory was 90%
Delay before Entering PE Mode {B3608} = My value - 0 (zero) Factory was set to 60 Seconds
PE Delay RPM Bypass {B3610} My value - 1200 RPM...I should have set this back to verify, but forgot.

In {B3634 to B3638} Lean Cruise Parameters, I did see that Lean Cruise Enable was set to 256 MPH? Does this PCM have a funky Lean Cruise denotion? I also saw that Lean Out Rate (EQ Ratio) is flatlined at 0.0000. Seems to me if this is the same calibration as the LS1 control we should easily see a much greater highway mileage in the end.

Anyway take this for what it's worth.

-Kenny

[GMPX]

Well, I looked at some 6L files I have here but I can't find one for that OS, the H2 file I looked at didn't have the delays you talk about.
A 2005 File I have does have the 60 second delay in {B3608}!, yikes!

Cheers,
Ross

[KAZ MotorSports]

Looking at the LQ9 of the same OS it shows {B3608} at 0 (zero).

I will have the same truck back down here in another week or two to do some more testing on.

By the way this truck belongs to Jardine Engineering. You aussies may not know who that is...but some of the old timers here in the US will know who that is. :D

We designed a set of Long Tube Tri-Y headers for the 6.0L 4X4 trucks. We gained 75 HP up top along with 105 ft/lbs of torque between 3000 and 3800 RPM with the headers on her.

So does anyone know what GM 4x4's use the same head (flange) design, frame locations, and front diff? I need to test these headers on some smaller and larger displacement if it is possible.

[cmitchell17]

A set of headers gained 105ft.lbs.:Eyecrazy:

I don't know about what sizes and stuff for the 4x4 trucks but I know I got a set of headers that fit on my 2wd 5.3 that won't fit on a 4wd without banging in one of the primaries.

[KAZ MotorSports]

That is why we are designing these headers. ;) These will be the ONLY long tube Tri-Y (torque monsters) headers on the market for the 4x4 Trucks. I have only seen shorties so far for the 4x4.

The 105 is tune and headers on 85 Octane on an LQ4.

[Afterhours Performance]

I would definitely be interested in these headers, I've been looking for longtubes for my truck for a while now. I have got 01' chevy k1500 w/ 5.3L and 4l60. From what i have seen for fitment of exhaust on the trucks and suv's is "if its half-ton 4x4 it will fit" whether it be p/u or suv, I think they are all pretty much the same. Hope this helps:cheers:

[hquick]

Designing any to fit a RHD 5.7L 98 K1500? ;)

[cmitchell17]

If you got 460+ft.lbs of torque from tuning and headers, ill take the LTs on my truck off right now and get some of thoes.

What is the diffrence in a tri-y header and a regular header?

[KAZ MotorSports]

Right Hand Drive? :Eyecrazy: What is that? :D Maybe if we got some measurements we could see if it was worth your while to try them on for size. Is the Diff housing on the left (your passengers) side of the truck like ours?

For the 1500 we are going to fit test them and as long as the frame rail and diff location is the same they should fit fine. But I am not making any promises until we fit test them. We are also going to fit test on a few SUVs as well. We also made these with a longer secondary on the drivers side (US version) to accommodate lifted 4x4's. I had a customers truck in here with a 3" body and 6" suspension...the front diff is obviously lower with certain suspension packages.

A Tri-Y is designed for torque production and a long tube Tri-Y is designed to gain bottom to mid torque and still allow a horsepower increase up top. I wish I knew the scientific ideas behind it...but all of this is in Jerry Jardine's head. I am the tuner and wrench in this project. ;)

Here is the graph showing the factory manifolds, headers with factory tune, and then the tune and headers. Look at the bottom end torque increase just putting the headers on.

To help you decifer this graph. The bottom three lines (solid) are HP and the top three lines (dotted) are torque. This is to the wheel on a Dyno Dynamics with correction added (28.4%). All that correction means is that going from my elevation (air density) to a Dyno Dynamics at sea-level density they will match up. I am at 6009' above sea-level. This does not include loss for drivetrain which would be another 15-20% to get crankshaft power numbers. So yes you should see 460-ish ft/lbs to the crank at sea-level density on an LQ4. We will be testing on an LQ9 in 2 weeks.

http://www.kazmotorsports.com/kenny/JARDINE.GIF

[cmitchell17]

So who makes these headers? When will they be avalible?

If you don't mind me asking what did you do to the stock tune to bump up the torque? (PE delay mode gone I bet)

The LT headers I just put on my truck I can't tell a diffrence at all. There 1/3/4 primaries and I think 2.5 collectors.

Do you know how the tri-y works?

[KAZ MotorSports]

The headers will be in full production (Made in the USA!) by the end of this month if everything falls in place the way we expect. I will post pictures of the production stainless headers as soon as they are ready. I do not want to post pictures of the prototypes until the finals are made. I am sure you understand why.

The headers are designed and built by Jerry Jardine. He is very well known for his expertise in headers design since the mid 1950's. He has decided, after years of seeing less than adequate designs being sold to the public, to get back in the gasser world. He and his sons have been in the diesel world for years. We will also be testing Tri-Y's for the F-body and C5/C6 corvette world in a few weeks. 105ft/lbs increase on an LQ4...imagine an LS7! :D

[hquick]

Right Hand Drive? What is that? Maybe if we got some measurements we could see if it was worth your while to try them on for size. Is the Diff housing on the left (your passengers) side of the truck like ours?


Yeah...diff is on the same side. I just installed a 4L80E trans (only one in the world I believe).
Mine's a 98 5.7L 4x4 Suburban with the Marine manifold and a Whipple SC.
I'm looking for a new exhaust setup but nothing is available here....considering making my own.

[tblu92]

Just tuned a 2006 truck today with the new V2 -version 7.53 and for the 1st time when I logged the 02 voltages , LTFT's,Commanded AFR --It showed that it went into OPEN LOOP at PE ---Recorded the 02 voltages correctly !!!
I have never been able to read that kind of data on any '06 before til now---
Hopefully it was a glitch in their software that was corrected--

[joecar]

Post some logs if you can.

[joecar]

HI---I still haven't set up the photo bucket thing so I can't load the log file on the 2006 Avalanche--BUT here it is---If you could can you post it for me?? If not that's OK--This is the 1st log before any adjustments were made after my tune--Seems to be close --rather lean though at WOT but I got the 02 voltages up to around .910 when i finished and no spark retard--------------thks TomTom, Here is the log you emailed me. Cheers, Joe

[joecar]

Yep, it shows it going OL and PE kicking in... this is what PE kicking should look like. (the HO2Sx1 voltages indicate you may be a bit lean at WOT... that may explain the knock.)