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Alcohol % PID

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Old 06-27-2014, 01:47 AM
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Default Alcohol % PID
Hi, i am swapping my truck over to flex fuel, and i noticed i didnt have any alcohol % pids, is it hiding, or does a custom one need to be made? thanks!
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Old 06-27-2014, 05:42 PM
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Anyone?
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Old 03-19-2015, 04:33 PM
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does any one have info on this I want to make sure that my new flex fuel sensor and tune work right thanks
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Old 03-19-2015, 06:12 PM
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Log commanded A/F.
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Old 03-20-2015, 06:30 PM
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Try deleting your vehicle from the scanner and re-polling once you have enabled FF.
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Old 03-21-2015, 09:08 AM
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Originally Posted by 2xLS1
Log commanded A/F.
Thats what im doing for now. i was trying to think of a way to use that to have a percentage cause im lazy but i came up with nothing. it was late and i was tired so it didnt get much thought.
Originally Posted by Pulse_GTO
Try deleting your vehicle from the scanner and re-polling once you have enabled FF.
I also tried this. i got nothing....
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Old 03-21-2015, 07:06 PM
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You compare the commanded A/F to what is in the Fuel>General>Stoich A/F table. Should have a table that looks like this on a FF OS.
Attached Thumbnails Alcohol % PID-stoich-af.jpg  
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Old 03-22-2015, 09:40 AM
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there are no flex-fuel tables in that old pcm... in a newer flex fuel vehicle with newer ecm's, there are separate tables specifically for e85.. separate timing tables, afr tables, etc... which are not available in that old pcm on that old truck.. and no, there would be no alcohol % pid's in that either, since it was never made for flexfuel/e85, so it never had any sensors for it.. so no parameter to log for it...
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Old 03-22-2015, 11:43 AM
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Originally Posted by 06MonteSS
there are no flex-fuel tables in that old pcm... in a newer flex fuel vehicle with newer ecm's, there are separate tables specifically for e85.. separate timing tables, afr tables, etc... which are not available in that old pcm on that old truck.. and no, there would be no alcohol % pid's in that either, since it was never made for flexfuel/e85, so it never had any sensors for it.. so no parameter to log for it...
I was replying to jrs01 who said he was converting to the FF sensor and wanted more info. One would assume that he is going to convert to a FF OS as well. The OP with the old truck is from almost a year ago.
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Old 03-23-2015, 12:13 AM
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Originally Posted by 2xLS1
You compare the commanded A/F to what is in the Fuel>General>Stoich A/F table. Should have a table that looks like this on a FF OS.
Thats what i have been doing but i was just seeing if it would come up in my scanner cause im lazy lol
Originally Posted by 06MonteSS
there are no flex-fuel tables in that old pcm... in a newer flex fuel vehicle with newer ecm's, there are separate tables specifically for e85.. separate timing tables, afr tables, etc... which are not available in that old pcm on that old truck.. and no, there would be no alcohol % pid's in that either, since it was never made for flexfuel/e85, so it never had any sensors for it.. so no parameter to log for it...
This is a 0411 pcm with a 02 tahoe FF OS with fuel comp sensor.
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Old 04-01-2015, 07:29 AM
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There is only one for that OS. In HP Tuners the alcohol PID is located under Fuel System > Alcohol Percent. There isn't a fuel temperature PID available for that vehicle that I'm aware of.

If you can't see it, you may have to use the "Clear Last Used Vehicle" button and reconnect.
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