Flex Fuel

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Last Post by inCarDoc 8 years ago

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macnealyk

(@macnealyk)

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Joined: 8 years ago

Posts: 3

Topic starter 04/07/2018 3:02 am

I have a Flex Fuel 2008 F150 with a 5.4 that has intermittent long crank and about every 20 cranks when cold I get a misfire code.

Cant see where I can check the Flex fuel inferred% or FF-INF% to check the ethanol content of fuel in the tank versus FF-INF with the OBD car doctor

Also I cant see where the Flex fuel learned: yes/no or FF-LRN with the OBD car doctor

These PIDS should help me understand how the PCM is perceiving the fuel blend after a completed learn.

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inCarDoc

(@incardoc)

Member Admin

Joined: 12 years ago

Posts: 783

04/07/2018 1:18 pm

Please note that App "OBD Car Doctor" supports only reading parameters and ECU's specified with OBD-II standard, OBD-II PIDs. Unfortunately that's not much regarding mixed fuel at all. One might need to review make/model specific protocols or parameters to get idea, if there are some custom PIDs that might be useful at your case.

If you get to know details on custom protocols and appropriate PIDs, we could help write appropriate configuration file for the app.

Thanks!

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macnealyk

(@macnealyk)

Active Member

Joined: 8 years ago

Posts: 3

Topic starter 09/07/2018 6:33 pm

https://ford.oemdtc.com/GSB/G0000079.pdf

I found this and on page 6 - 10 it gives some information that might help? to set up protocols

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macnealyk

(@macnealyk)

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Joined: 8 years ago

Posts: 3

Topic starter 19/07/2018 12:35 am

Update?

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inCarDoc

(@incardoc)

Member Admin

Joined: 12 years ago

Posts: 783

20/07/2018 10:27 am

Unfortunately the document states only some inner naming for extended PIDs, like FF_INF, FF_LRND, etc. But it gives no idea on exact addresses, ID's and decoding formulas for reading this parameters.

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