Back in an LBZ.... EFI live issue / question

[GeneralTJI]

Hi all!

Been a lot of years. In a strange turn of events, I am back in an LBZ. This truck has been deleted, and has a 5 position EFI tune onboard already. The tunes need work... mileage is terrible, and some other things need cleaned up/changed. I have HP Tuners from back in the day, but of course I can't pull the tune from the truck with HP. I may need to purchase EFI live in order to dial this truck in with the mods it has/mods I am doing.

Anyway, here is my question. I was told the tunes are not locked, so I should be able to pull them if I had EFI, but I don't want to lose the "deleted" part of the tune. I was under the impression that newer EFI live had to remove the emissions delete features like HP tuners did via the EPA? Is that just DPF related parts or? The truck did not have the EGR when I bought it, and did not come with it. And for all the reasons I'm not going to put any of that stuff back on of course.

Can I pull the tunes, tweak fueling and timing and make the other changes I want, then flash them back without changing anything emission related? Or does the newer EFI live v3 still allow removal of the EGR? Thanks for any clarification!

-Todd

 

[2004LB7]

From my understanding. They only restrict the emissions equipment on the LML and newer. I still have full control on my LMM and LLY with my efi live and it's up to date

 

[gmduramax]

IIRC you cannot read or edit a DSP5 file from LBZ/LMM. Something like that

 

[2004LB7]

Forgot about that ^

 

[Lennydmaxguy]

That's correct, DSP5 tunes can't be read. But the EGR controls are still accessible.

 

[malibu795]

Good reason to get another PC if I buy another EFI live

I've still got dsp2/5 controls

 

[GeneralTJI]

Oh... So if I buy EFI, I can't pull those tunes and edit and reflash? hmmm

It's a bummer I don't have the stock tune, I could pull it with HP and build a tune and be done. There is a possibility I could get the stock tune flashed back on by the guy I bought it from. He was the one who built the tunes I believe, and he maybe still has the stock tune. May be worth exploring. If he put the stock tune back on via EFI, I should then be able to pull it with HP and go to work (I think).

What are my other options? Get a stock ECU, and install it, and pull the tune and go....?

I don't remember there being a way I can change the VIN on say one of my old tunes from my other LBZ and tweak it and flash that back on the truck with HP.... I used to do a ton of tuning and I haven't used HP in a while so I'm foggy on that.

Just weighing up options but I don't want to brick the ECU or end up in a no start situation if I can help it

And thanks for the info guys

 

[2004LB7]

From my recollection. HP can't pull the DSP5 tune. Even the dealership can't. Something about the way the tune is built and the extra segments or free memory being used automatically locks the tune from being read. It's been a long time since I've read up on it so the details may be off

If I was in your shoes, I'd just rebuild the tune from scratch or try out one from our repository

The efi live scan tool can change VINs but you'll still need a license for that ECM if you purchase another one

 

[GeneralTJI]

From my recollection. HP can't pull the DSP5 tune. Even the dealership can't. Something about the way the tune is built and the extra segments or free memory being used automatically locks the tune from being read. It's been a long time since I've read up on it so the details may be off

If I was in your shoes, I'd just rebuild the tune from scratch or try out one from our repository

The efi live scan tool can change VINs but you'll still need a license for that ECM if you purchase another one

Appreciate the info and you are right, I found one version of HP that was able to "read" the tune. The trans parameters are all there and in tact, but the ECU stuff is all blank.

I'm pretty sure this ECU is not the original ECU from the truck. I need to double check but I think the VIN that showed up on that tune is not the same VIN on the title. Could be that HP didn't read that right as well.

Worried if I start a tune from scratch with HP, the truck won't run because I will have the wrong VIN...? I rememeber the 30min VATS re-learn procedure, but I still need to flash the tune with a VIN on that tune that matches the ECU? or am I missing something on that.

Thanks for your time helping me sift through this situation

 

[Woody35]

TIS

Put your vin into this and it will give you the correct OS and segment numbers. I am sure someone on here will have the correct stock tune that matches all those numbers in their collections.

 

[Lennydmaxguy]

Your best bet, as others have said, is to get a stock file that matches the truck's VIN. You can flash over the tune that's in your ECM, you just can't read it. If you still want a DSP5 tune, there are various decent tunes floating around, and I believe Guy Tripp made scripts to copy multiple single tunes into one DSP5.

 

[Lennydmaxguy]

OTOH, if you already have HPTuners and want to use that, I can supply a stock tune for you to build off of. You probably won't be able to have a DSP tune with HP though

 

[2004LB7]

If you want the DSP5, you should invest in efi live. Autocal of you want someone else to make the tunes. Or a V2/V3 if you want to tune yourself

 

[GeneralTJI]

TIS

Put your vin into this and it will give you the correct OS and segment numbers. I am sure someone on here will have the correct stock tune that matches all those numbers in their collections.

Oh this is great, thank you!
Will do this!


Yea I’d like to use my HP. Save some money not buying efi live…The 5 tunes would be nice but in the past I’ve had good luck building single tunes that would do most everything well enough. This truck isn’t going to be raced so a nice ‘safe’ bump in power will be enough for its mission.

You guys are awesome!

 

[2004LB7]

Oh this is great, thank you!
Will do this!


Yea I’d like to use my HP. Save some money not buying efi live…The 5 tunes would be nice but in the past I’ve had good luck building single tunes that would do most everything well enough. This truck isn’t going to be raced so a nice ‘safe’ bump in power will be enough for its mission.

You guys are awesome!

This is how I like my tunes. No switching. Transmission likes it better anyways.

 

[Cougar281]

From my recollection. HP can't pull the DSP5 tune. Even the dealership can't. Something about the way the tune is built and the extra segments or free memory being used automatically locks the tune from being read. It's been a long time since I've read up on it so the details may be off

If I was in your shoes, I'd just rebuild the tune from scratch or try out one from our repository

The efi live scan tool can change VINs but you'll still need a license for that ECM if you purchase another one

The reason the DSP tunes for the LBZ/LMM not being able to be released, as I recall, is because part of it is written to an area that can be written to but not read.

 

[Cougar281]

Appreciate the info and you are right, I found one version of HP that was able to "read" the tune. The trans parameters are all there and in tact, but the ECU stuff is all blank.

I'm pretty sure this ECU is not the original ECU from the truck. I need to double check but I think the VIN that showed up on that tune is not the same VIN on the title. Could be that HP didn't read that right as well.

Worried if I start a tune from scratch with HP, the truck won't run because I will have the wrong VIN...? I rememeber the 30min VATS re-learn procedure, but I still need to flash the tune with a VIN on that tune that matches the ECU? or am I missing something on that.

Thanks for your time helping me sift through this situation

It doesn't matter if the vin matches. If you were to swap in another ECM, the security keys wouldn't match which would cause a no start, but you'd just need to do a security relearn or disable it in the tune. It's been a while since I've done it, but I don't think a full flash wipes out the security keys.

 

[GeneralTJI]

TIS

Put your vin into this and it will give you the correct OS and segment numbers. I am sure someone on here will have the correct stock tune that matches all those numbers in their collections.

Can you help me decipher properly.....
I see a lot of numbers, but I also see this same 12616700 when I try to pull the tune.... also see 52616698 when trying to pull the current tune with an old version of HPT. So not quite sure what to make of that. This ECU is an 06, but the truck is an 07. The VIN on the ECU and body of the truck don't match so it has been changed at some point.

Thank you for the help!

 

[Stroked06Goat]

Possible to have 06 ECU into the early 07's stock? Well you said vins don't match though. DSP5 alters the operating system hence why it can't be read out. Lenny knows his stuff...good dude I see him often on the hp forum as he's one of us few thumbing around in the diesel stuff
I do have some stuff as well if needed. I just happen stance downloaded all i could diesel related the year before the repository got castrated.

 

[GeneralTJI]

Possible to have 06 ECU into the early 07's stock? Well you said vins don't match though. DSP5 alters the operating system hence why it can't be read out. Lenny knows his stuff...good dude I see him often on the hp forum as he's one of us few thumbing around in the diesel stuff
I do have some stuff as well if needed. I just happen stance downloaded all i could diesel related the year before the repository got castrated.

I did some checking. The vehicle VIN is a 2007 GMC 3500HD (Didn't catch this, because it's not a dually..... and it's a short bed.... so WTF?!). The ECU appears to be from a 2006 Chevy 2500HD. So this just gets more interesting.

Another thing that is quite strange is that the vehicle VIN says not found in that TIS website listed above! The screenshots I posted above from the TIS site are from the VIN listed in the ECU... and that is what matters for finding a stock tune of course.. but strangely the VIN on the truck doesn't show up there! But it does show up as the 07 3500 GMC on carfax etc.

Hmmmm.... guess it's good we got it pretty cheap ?

Still not quite sure what OS stock tune I am in need of though....