Motiv Flex Fuel Installation Guide

[criems]

I'm sorry to hear that, but also happy I'm not the only one with this issue. Motiv wanted me to ship the box back for troubleshooting. They wouldn't ship me a new box to try in the meantime:

"It will need to be turned in before a new one is sent. Its possible it could just need to be software updated if its corrupt or something else that we need to troubleshoot and figure out regardless if a new replacement box is issued or not."

They said they never have seen this issue before lol. I shipped the box back yesterday so I'll keep you updated. I would shoot them an email so they know its more common than just me. I had a feeling I would have issues before I bought it. Maybe another "bad batch"

 

[proboner]

I'm sorry to hear that, but also happy I'm not the only one with this issue. Motiv wanted me to ship the box back for troubleshooting. They wouldn't ship me a new box to try in the meantime:

"It will need to be turned in before a new one is sent. Its possible it could just need to be software updated if its corrupt or something else that we need to troubleshoot and figure out regardless if a new replacement box is issued or not."

They said they never have seen this issue before lol. I shipped the box back yesterday so I'll keep you updated. I would shoot them an email so they know its more common than just me. I had a feeling I would have issues before I bought it. Maybe another "bad batch"

Awesome, thanks man! Keep me (us) updated!

 

[criems]

Awesome, thanks man! Keep me (us) updated!

Box was delivered back to Motiv on the 28th of July. Still haven't heard back yet...

 

[proboner]

Box was delivered back to Motiv on the 28th of July. Still haven't heard back yet...

Definitely email them keep on em about it. I had a very similar experience and it took much longer than suggested to follow through.

 

[criems]

Definitely email them keep on em about it. I had a very similar experience and it took much longer than suggested to follow through.

They re-opened my email thread. They tested the box and said it is working properly. They believe that it is an issue with the orange 5v wire going to pin 25 reading outside of 5v +/- 0.2v. I checked pin location and verified that it is reading 5.08v so that doesn't appear to be the issue.

 

[proboner]

They re-opened my email thread. They tested the box and said it is working properly. They believe that it is an issue with the orange 5v wire going to pin 25 reading outside of 5v +/- 0.2v. I checked pin location and verified that it is reading 5.08v so that doesn't appear to be the issue.

This is frustrating. Any plans?

 

[criems]

This is frustrating. Any plans?

Got an email notification that they shipped me a new flex fuel kit. No explanation though. Not sure if the box or harness is bad. Guess I’ll find out when it gets to me.

 

[proboner]

Got an email notification that they shipped me a new flex fuel kit. No explanation though. Not sure if the box or harness is bad. Guess I’ll find out when it gets to me.

Sounds good, post an update when you get it installed!

 

[mj6234]

Can't you just update the scaling in the flash to match observed reading? It is a simple table.

 

[proboner]

Can't you just update the scaling in the flash to match observed reading? It is a simple table.

I have no idea if this is possible or how one would do this? Suggestions?

 

[mj6234]

If you are using the wired sensor into the DME through the ECA, this table works. It is in the public XDFs.

If you are doing it through Reflex+, not sure on that or if it is possible. Are you using the GM ethanol sensor they recommend?

 

[proboner]

If you are using the wired sensor into the DME through the ECA, this table works. It is in the public XDFs.

View attachment 84741

If you are doing it through Reflex+, not sure on that or if it is possible. Are you using the GM ethanol sensor they recommend?

Flex Fuel box and ethanol sensor directly from Motiv. I'm guessing that's the GM sensor.

 

[criems]

Sounds good, post an update when you get it installed!

Same issue. Going to get an ethanol gauge to check the GM sensor, although this is my second one. If it reads correctly I’ll just run MHD map switching (93, E30, E50) with the gauge and get a custom tune for those. Too bad.

 

[mj6234]

Flex Fuel box and ethanol sensor directly from Motiv. I'm guessing that's the GM sensor.

You could log ECA voltage and adjust breakpoints/E% to address your actual measurements. I havent tested my gas directly, but I have noticed filling up on straight 91 logs as 5-8% ethanol and adding E85 gives an expected result.

 

[proboner]

You could log ECA voltage and adjust breakpoints/E% to address your actual measurements. I havent tested my gas directly, but I have noticed filling up on straight 91 logs as 5-8% ethanol and adding E85 gives an expected result.

I imagine yours is correct. Pump 91 measures out as 8% ethanol for me with the actual tester... 21% measured by the ECA displayed in MHD

 

[criems]

Update: ended up getting one of the Innovate gauges off Amazon and hooked it up. Reads 10.1%. Gonna just go this route with a multi-map for E30 and E50. Must be an issue with the FF box.

 

[proboner]

Update: ended up getting one of the Innovate gauges off Amazon and hooked it up. Reads 10.1%. Gonna just go this route with a multi-map for E30 and E50. Must be an issue with the FF box.

Thanks for the update, I may have to go this route as well. Frankly I'm just sick of trying to fix the constant issues with this Motiv product. Pretty shitty, IMO.

Would be super stoked if I could integrate the ethanol readout with my P3 vent gauge...

 

[criems]

Thanks for the update, I may have to go this route as well. Frankly I'm just sick of trying to fix the constant issues with this Motiv product. Pretty shitty, IMO.

Would be super stoked if I could integrate the ethanol readout with my P3 vent gauge...

I'm pretty sure that's possible, or at least that there is a P3 option that can do that. I've recently found that bimecu.com has a new flex fuel module that connects thru CAN. I thought it was only for F and G series cars but apparently, there's a posi tap version that works for N54. I'm giving that a shot now. It should be the same function as the flex fuel module in the new Motiv Reflex, but I don't have to spend Reflex money or deal with Motiv again.

 

[khhoang86]

installed flex fuel box and sensor onto my 07 335i. flashed the custom tune from my tuner with flexfuel enabled. ethanol reads 20% at 1.02 ECA voltage. currently on 93pump fuel i assume it should be reading 10%. any idea why its reading high? or how to fix?

 

[proboner]

Product issue? The few posts above yours discuss this exact issue. This box is a bad product, IMO. I've had nothing but issues with it, this one being the latest, and from what I can tell it's not fixable.