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Gen III Flex fuel Write-up

Old 04-18-2016, 08:31 AM
  #21  
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Good info!
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Old 11-02-2016, 01:31 PM
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Does the timing adjust when the E85 fuel % increases when using the 411 PCM? I see this OS is missing the Blend Factor table that the P59 uses. I would like to try this out if everything performs correctly.

Last edited by Monte4ever; 11-02-2016 at 01:56 PM.
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Old 11-04-2016, 10:00 AM
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Hi There;
Sorry to bother but it seems the pictures of the original write-up are unavailable...
Any chance of getting them back?
Thx!!!
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Old 11-12-2016, 07:57 AM
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I talked to Hptuners support about adding the Open Loop Blend Factor table to OS 12216125 for the 411 PCM (P01). I can access that table now using Hptuners Beta 3.3 version. From my understanding they will be adding this to the next upgrade.
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Old 11-12-2016, 07:59 AM
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Originally Posted by saabman View Post
Hi There;
Sorry to bother but it seems the pictures of the original write-up are unavailable...
Any chance of getting them back?
Thx!!!
I can still see the pics on my phone.
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Old 11-14-2016, 03:19 AM
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Originally Posted by Monte4ever View Post
I can still see the pics on my phone.
They are back now... must have been a temporary issue
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Old 11-15-2016, 07:37 PM
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Forgive me for my ignorance...

Let say I have a 1998 F-body
I was thinking of going to the 0411 PCM, (I believe my 98 PCM is bad)
I would need a 3 bar SD tune
I would LOVE to go flex fuel, since E85 is a little hard to find in Florida

-I would need to do a repin to the 0411/ Van PCM
- Wire in the Flex Fuel sensor
-Use the cargo Van PCM (12586243)??
-HP tuners has a bin file to do these things for the Van PCM??
-Do Massive burnouts
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Old 11-15-2016, 08:15 PM
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If you are going over 16psi then yes you would need the P59 PCM. That OS does support Flex Fuel but make sure the file has flex fuel enabled. Here's some threads with some good info.
https://ls1tech.com/forums/conversio...-6-0l-lq9.html
https://ls1tech.com/forums/pcm-diagn...estions-2.html

Last edited by Monte4ever; 11-15-2016 at 09:26 PM.
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Old 12-03-2016, 06:26 PM
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So nobody has done this on fbody yet?
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Old 12-03-2016, 11:16 PM
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Originally Posted by Monte4ever View Post
I talked to Hptuners support about adding the Open Loop Blend Factor table to OS 12216125 for the 411 PCM (P01). I can access that table now using Hptuners Beta 3.3 version. From my understanding they will be adding this to the next upgrade.
How can you access this now? Did you have to do a segment swap or something?
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Old 12-04-2016, 05:26 AM
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Originally Posted by crispytoast View Post
So nobody has done this on fbody yet?
do research before you make such a claim
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Old 12-04-2016, 09:20 PM
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I am trying, cant seem to figure out if I need to repin my fbody harness to use the p59 pcm. it was a question not a statement. I am ignorant....enlighten me.
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Old 12-04-2016, 10:04 PM
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you dont need to repin
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Old 12-04-2016, 11:30 PM
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Does a.c. and cruise still work on p59 without repin?
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Old 12-05-2016, 10:19 AM
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You will find that you will not receive much help on this topic from members with the exception of a few:

Listen to Subeone. Do a search of his name, and see what he has said about the topic. I have a 1998 F-body and am currently doing the swap now. I had to do a repin to switch to the 99+ P01 PCM, then I plugged the P59 PCM into it. I still have to iron out the proper OS in order to get the Flex fuel sensor, 3 bar MAP sensor, and fuel gauge to work.
Bingmandengo also has been a huge help. He has the system running on his turbo LS buick right now.
We all want 3 bar SD tunes with flex fuel....its just a matter of time
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Old 12-06-2016, 11:14 PM
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3 bar, flex fuel, cable throttle still working on my turbo buick..

I helped Corner Worker get his 98 F-body running tonight on an 05 p59 ecm. We should know soon if the p59 will fully integrate(gauges, ac, etc..) with an F-body.
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Old 12-07-2016, 12:58 AM
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I look forward to hearing the verdict.
Did you just plug it straight in? No repining or anything? If it is a direct plug and play I'll go ahead and swap in a p59 before I start tuning this weekend.
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Old 12-07-2016, 02:14 PM
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Sounds like it plugs in. Might have to trim the the red sleeve on the harness to fit because it's keyed different. I believe you just cut the notches off the red sleeve. The p59 is keyed for a green sleeve. Or can find a green sleeve and swap it I guess too but trimming shouldn't be an issue.

Also, I'm trying to figure this out but the O2 sensors are wired slightly different afaik. One source I talked to says they hook up but throw an O2 heater fault code so may be just as simple as shutting off that code. I guess the f-body sensors are powered and grounded directly whereas as a P59 pcm supplies the heater ground.

Also you have to make sure the p59 pcm has an IAC driver if you want to use drive by cable. Sounds like not all of them are drive by cable capable.
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Old 12-07-2016, 02:32 PM
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Originally Posted by bigmandengo
3 bar, flex fuel, cable throttle still working on my turbo buick..

I helped Corner Worker get his 98 F-body running tonight on an 05 p59 ecm. We should know soon if the p59 will fully integrate(gauges, ac, etc..) with an F-body.
I'd think you'd be able to direct wire the tach, speedo, oil pressure gauge and engine temp to the in dash gauges. Not sure on voltage and gas gauge yet. I haven't started my car yet but it's all direct wire in my car so far. Trying to figure out the pcm swap and should be able to start it up. Ordering one today.

As for AC, I was reading that the p59, as long as it has drive by cable capability, should be able to control AC as well. I guess when GM removed the drive by cable capability of their pcm they also removed the AC 12v control and converted to a serial controller. The serial controller won't work with an f body from what I have read.
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Old 12-09-2016, 06:58 AM
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Originally Posted by 98_WS6_M6 View Post
I'd think you'd be able to direct wire the tach, speedo, oil pressure gauge and engine temp to the in dash gauges. Not sure on voltage and gas gauge yet. I haven't started my car yet but it's all direct wire in my car so far. Trying to figure out the pcm swap and should be able to start it up. Ordering one today.

As for AC, I was reading that the p59, as long as it has drive by cable capability, should be able to control AC as well. I guess when GM removed the drive by cable capability of their pcm they also removed the AC 12v control and converted to a serial controller. The serial controller won't work with an f body from what I have read.
All the gauges work, except for the tach currently. I can see RPM on the scanner. I did a segment swap from an express van for the fuel gauge since my car is a 1998. Currently, the problem Im having is the car runs dead lean. Im sure I have some parameter incorrect, or my VE table is that wrong. As far as AC goes, my AC doesnt work anyway, so I really dont care about that since it will be removed shortly. This car is has stock engine, but I have a 5.3 bullet going in with a couple turbskies once I figure out the tuning. My 3bar map sensor just arrived, as well as my flex fuel sensor. Both will be installed next week since Im going out of town this weekend. Ill be sure to update my progress with the lean condition and if I figure out the tach situation.
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