Motiv Flex Fuel Installation Guide

[matreyia]

I struggled to work out how to install the sensor and hose until I found that post and looked up the part on realoem. It would be nice if motiv had even a basic guide to point novices like me in the right direction

I think that folks who are doing stuff like this are so advanced that we forget there are beginners who have never taken off these mechanical parts. We just assume everyone knows basic parts anatomy.

 

[E90TommyB]

Is it okay if i use to pointy side of the post tap on the orange power wire?

 

[NoGuru]

Is it okay if i use to pointy side of the post tap on the orange power wire?

Yes, that is how it is intended to be used.

I do think the sensor install could use a little more guidance. I ended up removing it and tightening all the connections and reinstalling it.

 

[Jeffman]

Pretty good ones here... http://www.e90post.com/forums/showthread.php?t=1308685

Probably would make a good post on this forum too!

Here it is:
https://bmw.spoolstreet.com/threads/doh-im-not-afraid-to-look-like-an-idiot.3522

 

[E90TommyB]

How did you guys run the wire into the dome box? I put mine over the top and didn't close the lid all the way but idk if thats okay to do or not.

 

[baturbo]

How did you guys run the wire into the dome box? I put mine over the top and didn't close the lid all the way but idk if thats okay to do or not.

I put a slit in the rubber grommet and pushed the wire in, before sealing the lid.

 

[Jake@MHD]

I put a slit in the rubber grommet and pushed the wire in, before sealing the lid.

This is the recommended approach. I would also put the slit at the very bottom of the grommet. Making sure the lid is sealed and locked back up is very important.

 

[E90TommyB]

I put a slit in the rubber grommet and pushed the wire in, before sealing the lid.

The rubber grommet that the main wires go through? What about the ground wire?

 

[NoQuarter]

The rubber grommet that the main wires go through? What about the ground wire?

Yes. Make a slit for both.

 

[langsbr]

Hi @jyamona, I've installed my Flex fuel but the ethanol content is registering 0% with what should be E30 at a minimum and likely closer to E50.

The ECA voltage is reporting 1.36V. One thing I noticed is once I turn the ignition off, if I am still logging, the ECA voltage goes to 4.45V.

Is there anything I can do to diagnose the issue? I have a flexfuel "tweaked" tune, the flex fuel option in MHD, the sensor installed and connected, etc.

 

[Jake@MHD]

Hi @jyamona, I've installed my Flex fuel but the ethanol content is registering 0% with what should be E30 at a minimum and likely closer to E50.

The ECA voltage is reporting 1.36V. One thing I noticed is once I turn the ignition off, if I am still logging, the ECA voltage goes to 4.45V.

Is there anything I can do to diagnose the issue? I have a flexfuel "tweaked" tune, the flex fuel option in MHD, the sensor installed and connected, etc.

Hi, who did your tune? Sounds like it was not setup correctly and the FlexFuel logic was not added.

 

[NoQuarter]

Hi @jyamona, I've installed my Flex fuel but the ethanol content is registering 0% with what should be E30 at a minimum and likely closer to E50.

The ECA voltage is reporting 1.36V. One thing I noticed is once I turn the ignition off, if I am still logging, the ECA voltage goes to 4.45V.

Is there anything I can do to diagnose the issue? I have a flexfuel "tweaked" tune, the flex fuel option in MHD, the sensor installed and connected, etc.

Seems to me the "tweaked" tune you have has not followed the proper flex fuel tune conversion process completely.

 

[langsbr]

I will reach out to my tuner. Thanks

 

[Jake@MHD]

I will reach out to my tuner. Thanks

Who are they? I would like to talk to them to make sure they are doing it correctly going forward.

 

[langsbr]

New map from tuner, same result. Does anyone have a map that has been run thru it correctly that I can flash to confirm operation? All of my maps are just MHD files.

 

[Jake@MHD]

New map from tuner, same result. Does anyone have a map that has been run thru it correctly that I can flash to confirm operation? All of my maps are just MHD files.

Do you have your "stock" bin? If so just drag and drop that on the FF tool exe and flash the bin that it spits out.

 

[langsbr]

unfortunately I do not have stock bin. My car had Cobb on it when I got it and no AP. I had to flash to stock using MHD.

 

[Jake@MHD]

unfortunately I do not have stock bin. My car had Cobb on it when I got it and no AP. I had to flash to stock using MHD.

Ok PM me your rom type and email address and I will send you one in a bit.

 

[Jeffman]

I experienced a crunching sound while installing the short Motiv Flex Fuel line. I’ve never used these kind of connectors before. I grabbed the male collar with thin vice grips and a wrench on the female side to tighten it and heard a crunching sound while tightening. Did I f something up?

 

[R.G.]

Knowing this thread existed would have been helpful

I experienced a crunching sound while installing the short Motiv Flex Fuel line. I’ve never used these kind of connectors before. I grabbed the male collar with thin vice grips and a wrench on the female side to tighten it and heard a crunching sound while tightening. Did I f something up?

They're aluminum fittings, Id guess it was some give with the vice grip and/or wrench since not using AN wrench. The best way to check is to connect battery, check for leaks, hit unlock on fob, check for leaks, flip start button on / off a couple of times (keep engine off), check for leaks. Once you're confident all misc. things are connected, fire it up and check for leaks. If all dry, then nothing I'd be concerned with