Using the GM flex fuel sensor on an Fbody
I'm told by several people and reliable sources the Ford sensor uses the same range as the GM sensor. I have one sitting on the shelf from a junked Taurus that has thread in connectors but I've been too busy to install it.
Just stumbled across this, hopefully not too old for a revival. lol Has anyone switched from the red/blue pcm to the green/blue pcm in order to run a COS with flex fuel capabilites? I have searched around for the last couple days without much luck.
This is what I'm working on right now. Im going with a 2005 express pcm and os. This should give me DBC, flex fuel and 3 bar capabilities.
I actually posted some more info on this in the other thread you had posted in as well ... https://ls1tech.com/forums/pcm-diagn...flex-fuel.html
Keep us posted, I could see quite a few interested people if it works as smooth as I think it would.
I actually posted some more info on this in the other thread you had posted in as well ... https://ls1tech.com/forums/pcm-diagn...flex-fuel.html
It's not their decision, it's a limit of the available memory space in the PCM...since there's flex fuel stuff in there, there's less space for a 3-bar VE table.
The newer (blue green) pcm's have twice as much memory...which is why they can support both.
HPTuners at least gave that PCM/OS 2 bar support. EFILive has no COS support for that OS.
The newer (blue green) pcm's have twice as much memory...which is why they can support both.
HPTuners at least gave that PCM/OS 2 bar support. EFILive has no COS support for that OS.
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Staging Lane
Joined: Mar 2007
Posts: 52
Likes: 0
It's not their decision, it's a limit of the available memory space in the PCM...since there's flex fuel stuff in there, there's less space for a 3-bar VE table.
The newer (blue green) pcm's have twice as much memory...which is why they can support both.
HPTuners at least gave that PCM/OS 2 bar support. EFILive has no COS support for that OS.
The newer (blue green) pcm's have twice as much memory...which is why they can support both.
HPTuners at least gave that PCM/OS 2 bar support. EFILive has no COS support for that OS.
Not saying one is better than the other i have both as well as tunercat
Having all the tuners is better than having one
On a side note I will be doing a p59 pcm flex fuel 3 bar running a 5.3 turbo in a sn95 mustang as my next project.
My current ride is using a flex fuel sensor with a e38 pcm (4.8 turbo in a 03 wrangler) and it is great being able to switch back and forth without having to worry about finding e85 everywhere I go as well as compensating for e85 mixture variations (seeing 62 to 83 percent station to station)
Yes but efilive supports 3 bar on the newer p59 flex fuel os's where as hpt only lists 2bar
Not saying one is better than the other i have both as well as tunercat
Having all the tuners is better than having one
On a side note I will be doing a p59 pcm flex fuel 3 bar running a 5.3 turbo in a sn95 mustang as my next project.
My current ride is using a flex fuel sensor with a e38 pcm (4.8 turbo in a 03 wrangler) and it is great being able to switch back and forth without having to worry about finding e85 everywhere I go as well as compensating for e85 mixture variations (seeing 62 to 83 percent station to station)
Sounds like a cool project. Good luck.
Staging Lane
Joined: Mar 2007
Posts: 52
Likes: 0
on the p59 file
what osid#?
dbw or dbc?
you happen to have a hptuners file from it??
i tried a bunch of different truck and van p59 files and could never find one with 3 bar support in hpt ( i prefer hpt for gen 3 tuning) i use efilive for gen 4 tuning due to virtual ve) and the occasional engine swap that needs a non os matching vin (efilive will let you write a jeep vin into a gm pcm)
2005 (and just about all other 2003-2007 years) Silverado is a P59 that's flex fuel and 3-bar capable with HPTuners, DBW. 2004 GTO and 2005 Vans are both P59's that are flex fuel, 3 bar capable and DBC.
Staging Lane
Joined: Mar 2007
Posts: 52
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that is not a flex fuel calibration
the calibration may be flex fuel capable (requires a tuning software that can turn flex fuel on and enable the real sensor option (otherwise you get that stupid virtual flex fuel crap)
in the p59 pcm hptuners won't do either
i know tunercat will and i think efilive may
on factory flex fuel pcm's the stoich table is filled out with the correct values
(not 14.68 across the table)
the calibration may be flex fuel capable (requires a tuning software that can turn flex fuel on and enable the real sensor option (otherwise you get that stupid virtual flex fuel crap)
in the p59 pcm hptuners won't do either
i know tunercat will and i think efilive may
on factory flex fuel pcm's the stoich table is filled out with the correct values
(not 14.68 across the table)
Would it not be a simple thing to just copy one of those tables over after enabling the capability? I mean it is not like the guys like myself that are running 3 bar speed density are going to use a stock table anyways.....
Staging Lane
Joined: Mar 2007
Posts: 52
Likes: 0
the thing is sometimes there are other tables that none of the tuning company's have given us access to that need to be populated for flex fuel to work correctly
i have yet to see a dbc p59 file with factory flex fuel
you would want to use a stock flex fuel stoich afr vs alcohol table as it is setup correctly
the tables just copy over enabling flex fuel via hp tuners is pretty much impossible. if you don't have access to something that can you had best start with a flex fuel file
the thing is sometimes there are other tables that none of the tuning company's have given us access to that need to be populated for flex fuel to work correctly
i have yet to see a dbc p59 file with factory flex fuel
you would want to use a stock flex fuel stoich afr vs alcohol table as it is setup correctly
the thing is sometimes there are other tables that none of the tuning company's have given us access to that need to be populated for flex fuel to work correctly
i have yet to see a dbc p59 file with factory flex fuel
you would want to use a stock flex fuel stoich afr vs alcohol table as it is setup correctly
This is a factory flex fuel calibration. It shares the same operating system as the express van does however it is not DBC. It is a DBW calibration. They share all the same tables and the express file does have all the same ethanol tables. I guess I'm not seeing your point that this will not work with Hptuners.
Why Can't a fuel composition sensor be added and be functional with the express file? Many other gen 3 applications have added the sensor and enabled it through Hptuners.
Last edited by bigmandengo; Aug 21, 2014 at 11:16 PM.
Staging Lane
Joined: Mar 2007
Posts: 52
Likes: 0
Ok. Here is a file from a 2005 avalanche with the flex fuel 5.3..
This is a factory flex fuel calibration. It shares the same operating system as the express van does however it is not DBC. It is a DBW calibration. They share all the same tables and the express file does have all the same ethanol tables. I guess I'm not seeing your point that this will not work with Hptuners.
Why Can't a fuel composition sensor be added and be functional with the express file? Many other applications have added the sensor and enabled it through Hptuners.
This is a factory flex fuel calibration. It shares the same operating system as the express van does however it is not DBC. It is a DBW calibration. They share all the same tables and the express file does have all the same ethanol tables. I guess I'm not seeing your point that this will not work with Hptuners.
Why Can't a fuel composition sensor be added and be functional with the express file? Many other applications have added the sensor and enabled it through Hptuners.
also where do you select virtual vs real sensor??
i have yet to see either on any p59 file with hp tuners
here it is in efilive
From my research HPTuners has the ability to enable E85 the same as EFILive. 1st pic
Not all OS's have the ability to select a real sensor vs virtual like your pic, just as you said the tuning suites don't show us everything. 2nd pic
It is also my understanding that early flex fuel vehicles only used the sensor 2003-2005 not the virtual calculation. Just what I have seen, definitely open to more input on this.
Not all OS's have the ability to select a real sensor vs virtual like your pic, just as you said the tuning suites don't show us everything. 2nd pic
It is also my understanding that early flex fuel vehicles only used the sensor 2003-2005 not the virtual calculation. Just what I have seen, definitely open to more input on this.
Last edited by Agent_Orange_Shuvel; Aug 22, 2014 at 08:36 AM. Reason: add attachments