Flex fuel OS for LS1 PCM

[jmsmotorsport]

Does anyone have a stock tune file for a 12216125 OS or any other OS that I can use for flex fuel in a LS1b PCM.

[joecar]

See if you can find it in here: Tunefiledepot-has-been-replaced (https://forum.efilive.com/showthread.php?26662-Tunefiledepot-has-been-replaced)

[jmsmotorsport]

See if you can find it in here: Tunefiledepot-has-been-replaced (https://forum.efilive.com/showthread.php?26662-Tunefiledepot-has-been-replaced)


Cheers Joe, didn't realise tune file depot had been replaced that's awesome news, will have a look

[jmsmotorsport]

Yep found it in there thanks again joe. Does anyone know if there is a flex fuel enabled GM OS that is also custom OS enabled for boosted applications.

[ScarabEpic22]

Yes, but I dont believe for 512kb LS1 PCMs with EFILive. You'd have to go to 03-05 1MB LS1B PCM to get that.

[jmsmotorsport]

Do you have a OS Number? Or what year and vehicle it came out of. The PCM I have is a LS1B as far as I know. From a 2003 VY commodore

[Tre-Cool]

get a vz ls1 1mb ecu, then you can run e85 compatible os.

I'm pretty sure i have posted a base tune on the forum here already with e85/custom os

[Tre-Cool]

found em

2096620967

[jmsmotorsport]

ok so the VY PCM isn't a LS1B? That sucks, might have to source one for mine as it will be boosted the other car I'm doing is a Holden 355 running the LS pcm using a low frequency trigger.

[Tre-Cool]

it still a ls1b ecu, but it's called a p59.

[jmsmotorsport]

Ok so those are a 512k is the other VZ one a 411?

[Tre-Cool]

So ls1a ecu's were pre 1999.
ls1b ecompases both P01/P59 ecu's.

Pre99 & P01 is 512kb
P59 is 1024kb

P01 is blue/red connector
P59 is Blue/Green connector

Apart from some minor pin changes and slightly different shape on the green connector, it's almost plug/plug between the 2. You can file down green the connector plug and away you go

[jmsmotorsport]

Ok awesome so are the P59 a simple plug and play? Or do some pins need to be moved around

[Supercharged111]

There was a huge stink over on the Corvette forums about this and supposedly 1 dude had it figured out but wasn't talking. I need to update my software to view a ctz, but are there any weird tricks or asspain other than a full flash of that tune onto my P59 in my 2004 Z06? I picked up a blower for it and really want flex fuel ability.

[joecar]

There is a current thread on LS1tech.com regarding this, let me see if I can find it...

[Supercharged111]

I think I saw it too. I'd found more info on the swap but apparently not on the Corvette Forum because when I checked back there I couldn't find what I'd remembered reading.

[JCA]

So basically we need to run a vz ls1 ecu but then we have the problem of dbw

[jmsmotorsport]

So basically we need to run a vz ls1 ecu but then we have the problem of dbw

I reckon the Yukon is still cable that uses this PCM so should be able to use that OS

[Tre-Cool]

So basically we need to run a vz ls1 ecu but then we have the problem of dbw

no. u still keep cable throttle body.

[Supercharged111]

https://ls1tech.com/forums/pcm-diagnostics-tuning/1845056-c5-flex-fuel-questions.html

[joecar]

That's one of the threads... there's also another one...

https://ls1tech.com/forums/pcm-diagnostics-tuning/1675509-using-gm-flex-fuel-sensor-fbody.html

[spoolinsteve]

So I’m shifting through all this and I’ve come to the conclusion....

There is no way to do a COS on a the flex fuel operationing system for the p01 pcm?

[joecar]

You have to run the P59 PCM.