Adding Alcohol Sensor to 411 Ecm

[03Sierraslt]

I am trying to see what I have to do to add in a Alcohol sensor, obviously getting a sensor and hooking everything up is one thing but before I do I want to make sure my OS is compatible with it. Any one have any info? Thank You

12587603 is my original OS
1251052 is my current 2bar OS

[Eaglegoat]

To the best of my knowledge there are no 411 OS's that can support flex and boost.

[mecanicman]

To the best of my knowledge there are no 411 OS's that can support flex and boost.

12216125 is 0411 and will support flex fuel and 2 bar o/s.


7603 is not an 0411 o/s, its a 1mb or p59 o/s. This is not a flex fuel o/s and hpt does not have all the required switches to make everything work. You would be better switching to 12606961.

[03Sierraslt]

Thanks for the reply, what is 12216125 out of? Ok disregard, I found a couple in the repository. Looks like a SUV file. Now what would I do, just swap the engine segment?

[03Sierraslt]

If the OS is different then I cannot just do a swap, would I have to write a new OS? Not sure how that works.

[Eaglegoat]

Does it support 4l80e too?

[mecanicman]

03Sierraslt, the o/s you posted you had is not an 0411, so if this is what you have you cant use the 0411 o/s of 12216125. You would have to use 12606961. Whichever pcm you have, you would have to license a new file and do a write entire. Flex fuel o/s are quite a bit different then normal o/s, you cant just segment swap the engine sectioin.

Eaglegoat, if your asking if 12216125 can support 4l80 the answer is yes. 2002 avalanche 8.1 4l80 files use the same o/s so you can swap in the 4l80.

[03Sierraslt]

Wait, mines a 59 then?? Blue and green connector.

[mecanicman]

Wait, mines a 59 then?? Blue and green connector.

correct

[LaTechGTO]

12216125 is 0411 and will support flex fuel and 2 bar o/s.


7603 is not an 0411 o/s, its a 1mb or p59 o/s. This is not a flex fuel o/s and hpt does not have all the required switches to make everything work. You would be better switching to 12606961.

Interesting. I know a couple of people running a 603 file with FF working, even with 2 and 3 bar tunes... even have it controlling a 4L80E through a segment swap.

[mecanicman]

Interesting. I know a couple of people running a 603 file with FF working, even with 2 and 3 bar tunes... even have it controlling a 4L80E through a segment swap.

Not sure you read everything based on your response. So let me add to it. There is no o/s that cant be 80e swapped on a p01/p59 although some hpt can not do. I have used the hpt switches to turn on flex fuel on some o/s's and fuel related stuff works fine. The problem comes with getting all the timing stuff to work in relation to fuel composition. This does not seem to work unless using an actual flex fuel file.

[MikeOD]

This does not seem to work unless using an actual flex fuel file.

Exactly...even for example, 2005 Silverado OS 12592618 without flex fuel vs with flex fuel...if it's a base file that came without it, like my plain old LM7 truck, simply turning it on will correct fuel based on a sensor, but will not correct timing.

However...if I go to a 2005 file from say a flex fuel Avalanche, with the same OS, but flex fuel from the factory, it works fine for fuel and timing adjustments. There's more settings or tables that we don't have access to for the blend factor for timing I think.

[LSxpwrdZ]

I use the 603 based file on all my conversions.

[mecanicman]

I use the 603 based file on all my conversions.

Are you saying you have all the flex fuel stuff working?

[LSxpwrdZ]

I have it running in my personal procharged formula with 80E yes. It's been running for well over a year now this way. I have other customers cars that have been using this operating system with flex fully enabled as well both fuel and spark correction.

You'll notice below EST_Flex is the Flex Spark Adder advance. And obviously ethanol content reading as well.

Flex Fuel image.jpg

[LaTechGTO]

Not sure you read everything based on your response. So let me add to it. There is no o/s that cant be 80e swapped on a p01/p59 although some hpt can not do. I have used the hpt switches to turn on flex fuel on some o/s's and fuel related stuff works fine. The problem comes with getting all the timing stuff to work in relation to fuel composition. This does not seem to work unless using an actual flex fuel file.

Maybe I did read it wrong, so please feel free to correct how I was interpreting your statement. What I read - 7603 is not a FF file and won't function properly as such. OP should be using 12606961 instead.

Is that what you were trying to say?