maroonls1z

Has any one put an e38 PCM in a F-body and been able to convert it to flex fuel? i would like to be able to run E85 in my camaro without having to check the alcohol content on every fill up and change the tune so im currious if this has been done or if there is an easier way to do it

maroonls1z

okay after alot more reading i determined that there is a 1kb version of the 411 pcm that can be swapped into older models without much re-pinning and can run flex fuel. Only problem is it seems the a/c wont work because it requires a different type of signal, has any one figured out how to make that work?

MontecarloDrag

iTrader: (3)

I don't know about flex fuel, but the A/C signal can be changed to Fbody-Hvac with no issues (trucks use class-2 and fbody uses 12V)

maroonls1z

i was reading about it here
https://ls1tech.com/forums/conversio...cm-turn-c.html
but i didnt see an answer to making it run
also was seeing that the ls1-b 1mb pcm's are pinned for flex fuel but i have yet to be able to confirm that
http://forum.efilive.com/showthread....r-with-411-pcm

James@ShorTuning

I have a regular 411 512k file that is flex enabled from a truck. I wanted to see about segment swapping it into a standard 02 '156 OS but it isn't possible without hacking through the code and manually doing it. It is for a 5.3 4l60 2002 truck. I also have one setup for a 4l80.

Another sucky part is last time I checked there wasn't any custom OS's available for that particular OS so that makes forced induction tuning a bit limited.

It would be easier I believe to use a P59 controller with a pre-05 OS. They went to virtual flex in 06. Most all the standard pinouts are still similar to the 0411 but some re-pinning may be needed to fully incorporate the PCM.

maroonls1z

interesting, i wil have to look into that. I also found a guy that says he was tuned for flex on his 411 512... i have sent an email to confirm

maroonls1z

okay so a 2002-2005 truck pcm is the p59, its dbw but you can change that to to dbc from what i hear. After re-pinning, or what im thinking about doing is making an adapter, would you be able to load an f-body file and everything work? i thought the a/c operates differently on the trucks with their high low signals?

James@ShorTuning

No the 2002 still used the 0411 PCM which is a P01 controller. They didn't go to the green/blue connector (P59) until late 2003 or 2004. The tune files between the two different controllers are not compatible even if the tune file on the P59 is a 512K file.

James@ShorTuning

Stumbled on scenario that would basically make this P59 Blue/Green PCM work in a Fbody with flex fuel and any of the 3 transmissions (60e/80e/t56). My dad has a 2005 Sierra flex fuel truck, I just bought a 2005 CTS-V. They both are running the same operating system thus segments from one another could be easily swapped. My CTS-V OS would need to be used in a Fbody with the engine and engine diagnostic segments swapped. You could then use the truck tranny segment for a 60E or a 2500hd tranny segment from a 6.0 truck that I also have with the same OS for the 80E.

Since my CTS-V is already running the PCM I am going to add the functionality to it first since it'll mainly be a more plug and play deal with it. I will report back results as I get them.

Next I have to source another P59 controller and try to get it working in my Fbody to see if it will work. Really curious to see if turning the ETC off in the tune will actually enable IACV functionality... this may be something that has to be added hardware wise to the PCM to function correctly. Time will tell.

tsmiley98

iTrader: (2)

Wouldn't there need to be some added sensors for fuel content?

Why not just tune for pump E85/70?


I tuned my 2000 to run on pump E85 and just about all of the E85 pumps in town tested out to around E70. One blender pump was a little higher but still not 85%.


When we dyno'ed it the fuel content was 72% ethanol. I've driven the car all over and fueled it out of town and raced it. Never once have i had an issue.

James@ShorTuning

It is very simple to flash the car for the correct stoich setting of the fuel type you are running but adding the flex fuel sensor and having the PCM do everything for you is way better, especially when you have customers that don't want to spend money for a laptop and a $500 cable to only re-flash two tunes to the car. I know there is the AutoCal that can be used as well but you are in the same boat there as well. If this works you get hassle free true flex fuel. Pump 93, E70 and E85 into the same tank and it'll compensate and report the correct stoich for the fuel in the feed line.

I have already done this on a few of the newer Gen4 cars with great results, and this is one of those bells and whistles that customers want so they can reduce there dependency on gas for one and two so that it is convenient so that they don't have to mess with a computer or handheld.

Thunderbirdkaan

P01 pcm (09354896) is it possible flex fuel sensor? Corvette c5 2000 year ls1

maroonls1z

James im running your ctsv tune in my camaro and it does work. I adjusted the fuel sensor output so that its seems to read pretty accurate with what the factory pcm reads. You do loose some bcm functions though, such as traction and cruise control

LilJayV10

iTrader: (39)

IIRC, there's a long thread on here about doing it, I'll see if I can find it.

LilJayV10

iTrader: (39)

https://ls1tech.com/forums/pcm-diagn...sor-fbody.html