N54 Stock DME Flex Fuel
- Thread starter Jake@MHD
- Start date
Ah yea, the new routines I wrote require IGN on and a second or two until they run
Had this on for quite a while. I am convinced it was the restart that got it working.
Interesting. Can you double check the DME wires are secured? How many restarts on avg is it 0 vs. the correct reading?
If I am consistently getting the voltage reading, which wire would be responsible for the % readout?
Three more starts and zero % each time.
A few things for you to try today:
1. Can you screenshot your "read codes" screen in MHD?
2. What is your exact vehicle?
3. What do the load, fuel and timing interpolation parameters log as?
4. Who is your tuner?
5. Can you disconnect the green wire going to the dme from the ECA and multimeter its output with car IGN on? Does not have to be running
6. What do ECA voltage and E% read in MHD while the wire is disconnected?
Thank you
I've noticed on my car e content stays at 100 for a few minutes and then changes to the actual e content (currently 9%). I flashed with the stg2+ acn fuel. The car seems to pull stronger than the v8 map prior to ff release. After adding 6gal pf e85 i am currently at e35. Everything seems to be working well for me. Havent had a chance to log anything yet.
Does it mean that OTS Users will never be able to run 100% E85 ? That was my goal, not for performance but for everyday use simplicity..Added you. The E50 limit is 100% for OTS users. For pro-tune, it is at the discretion of your tuner. They will evaluate your fuel system and should taper load/boost above a certain E% if necessary. Assuming you have a solid LPFP, and either PI or double barrel, there is no upper E% limit
It should not take a few minutes. The ECA does take a few seconds to boot and start supplying the DME with the signal, but you should be able to sit in the car (ign off), start monitoring on MHD, press ign on (don't start car, just ign on) and wait maybe 8-10 seconds and see Ethanol % populate correctly. Let me know when you are able to upload some logs of various E%'s
There will never be an optimized OTS map for E85. Running E85 on OTS FlexFuel is basically the same as your 91/93 pump map power wise. If you wish to run E85 regularly, I advise you to get a pro-tune, so your tuner can evaluate your fuel system and recommend you upgrades appropriately if needed.
Some additional notes:
All Users:
The ECA takes a few seconds to boot and start sending it's signal to the DME. It gets its power at IGN on. I would suggest single pressing the button a few seconds before you start the car. You can monitor on MHD during this time to see about how long it takes for future reference. This will ensure you get the proper amount of fuel at start when running higher E% blends and not have to worry about cold start issues.
Tuners:
You MUST use the included bin format tool first followed by tuning with the FlexFuel XDFs. If you do not do this, the FlexFuel logic will not be added on the MHD side. You can tell the logic has not been flashed into the car if you have error codes (dmtl), ethanol content logs as 0 or incorrectly, and the fuel/timing/load interpolation values log as 0 or incorrectly. Additionally, on the "Read Codes" screen the last flashed map name should have a prefix of "FF_" automatically added to it, regardless of what name you gave the file.
JB4 Users:
Everything here is currently flash only. Terry@BMS will need to make suitable FlexFuel BEF's in order to take advantage of this feature.
All Users:
The ECA takes a few seconds to boot and start sending it's signal to the DME. It gets its power at IGN on. I would suggest single pressing the button a few seconds before you start the car. You can monitor on MHD during this time to see about how long it takes for future reference. This will ensure you get the proper amount of fuel at start when running higher E% blends and not have to worry about cold start issues.
Tuners:
You MUST use the included bin format tool first followed by tuning with the FlexFuel XDFs. If you do not do this, the FlexFuel logic will not be added on the MHD side. You can tell the logic has not been flashed into the car if you have error codes (dmtl), ethanol content logs as 0 or incorrectly, and the fuel/timing/load interpolation values log as 0 or incorrectly. Additionally, on the "Read Codes" screen the last flashed map name should have a prefix of "FF_" automatically added to it, regardless of what name you gave the file.
JB4 Users:
Everything here is currently flash only. Terry@BMS will need to make suitable FlexFuel BEF's in order to take advantage of this feature.
Looks like there was a small bug for that on IJ only. I will get that fixed and a new version 1.71 pushed out
