MOTIV RE|FLEX - ADVANCED I/O INTEGRATION

[Dumaurier7]

Correct, TunerPro will not see the OEM fuel pressure it only deals with the Reflex and MHD allows incorporating the Reflex LP fuel pressure monitoring so that it can be logged and warnings/ safety’s triggered when it is below range…. but I could be wrong but I think the OEM is logged by MHD?! U can contact them and verify.

 

[mikesrex]

Yes I can see the stock low pressure fuel sensor on the MHD logs. I can also log the Reflex values from the MHD app.

 

[shushikiary]

Well I got my reflex to work again by disabling can bus, so that tells me it was likely going into safe mode due to not having communication with the ECU. Jake got back to me said that the can bus option is the ECA option in MHD, even if you're not using an ECA, which I don't have enabled, so I'll have to try turning on the ECA option and then enabling can bus again and see what I get.

 

[mikesrex]

I selected that option in MHD when I flashed the new tune. I’m added port injection at the same time as flex fuel, so it was cool to see everything working well. So far the only screw up I found is that my number 2 fuel tank level sensor is stuck on zero. The Protool app tells me it’s number 2 but I have not been able to figure out whether that is the right or left one lol

 

[shushikiary]

I selected that option in MHD when I flashed the new tune. I’m added port injection at the same time as flex fuel, so it was cool to see everything working well. So far the only screw up I found is that my number 2 fuel tank level sensor is stuck on zero. The Protool app tells me it’s number 2 but I have not been able to figure out whether that is the right or left one lol

They are resistive, so if you pull the rear seat and unplug the plug to them on each side and measure the resistance it will be pretty clear which one is stuck at the max value. I believe they are around 650 ohms when full and 50 ohms when empty.

 

[mikesrex]

They are resistive, so if you pull the rear seat and unplug the plug to them on each side and measure the resistance it will be pretty clear which one is stuck at the max value. I believe they are around 650 ohms when full and 50 ohms when empty.

My 5 series has a plug on the pump side for everything, so maybe I can figure out the pin out to measure resistance. If low resistance is empty, this means the sensor is stuck in the low position, has a short, or is faulty. I’m going to guess it’s stuck. This means it is likely the sensor on the pump side, since there are extra wires and fuel lines around that one with the secondary pump.

 

[shushikiary]

Ok, so just FYI for anyone else like me.... I enabled the ECA option for motiv reflex so can bus integration could be turned on, turned it on in the reflex and everything ran, but because I DO NOT have an ECA it then throws a check engine light for the MHD+ 00005, so I'm un-doing that option as I'm not driving around with a check engine light... They need an option of can bus integration without ECA.

 

[shushikiary]

Talked with MHD, they say there is an option in the flash tune you can set to make the check engine light go away, your tuner just has to set that up for you.

Aka you have to "ReFlex FlexFuel Sensor Absent, to 1".

 

[veiss335]

This may have been discussed but what coils are you guys running with the reflex plus?
I have PR and the motive hates them.
I keep getting ethanol spikes.
I pulled them and reinstalled the eldors I had laying around and it seems to have cured the spiking issue. I know some have had issues with motive and PR in the past. Just wondering what coils play nice with the reflex.

 

[shushikiary]

This may have been discussed but what coils are you guys running with the reflex plus?
I have PR and the motive hates them.
I keep getting ethanol spikes.
I pulled them and reinstalled the eldors I had laying around and it seems to have cured the spiking issue. I know some have had issues with motive and PR in the past. Just wondering what coils play nice with the reflex.

I have the reflex and the PR coils and have no issues.

It's likely the way you routed things, or you have a spark plug wire that is not fully seated or something and thus a large source of EMI (electromagnetic interference). What you need to do is make sure to route all your reflex wires away from the power wires for the PR coils, and especially far way from the spark plug wires, and any metal you can have between them the better.

 

[veiss335]

I have the reflex and the PR coils and have no issues.

It's likely the way you routed things, or you have a spark plug wire that is not fully seated or something and thus a large source of EMI (electromagnetic interference). What you need to do is make sure to route all your reflex wires away from the power wires for the PR coils, and especially far way from the spark plug wires, and any metal you can have between them the better.

I tried different routing. Even wrapped the ethanol wire in foil. Im sure the plug wires were seated correctly.. Do you have your PRs on the hot side or mounted to fuel rail?
I'm not sure if I can even get to my factory fuel rail due to Phoenix intake PI rail. But I do have both mounting options. I may try to fool with it once ken is done with the tuning.

 

[shushikiary]

They are on a mount that is held down by 2 bolts on the intake manifold.

Putting foil around the wire will do next to nothing unless it was grounded (on one end only, not both ends). If it's EMI that will protect the wire, but the voltage supply for the sensor would also need to be shielded. Then the ground would be the next possible problem, but there's not a lot you could do to fix that.

 

[mikesrex]

I’m running Delphi coils with one step colder plugs on mine without issue, other than the car detecting misfire on upshift at wide open throttle and higher rpm shifts. I changed max rpm to 6500 to prevent the misfire detection on upshift. Ken sent me a revision to prevent this, but I have not had a chance to try it out. I also ordered a kit to run b58 coils and should be able to try everything out this weekend as the track.

 

[VasN54]

Your reflex harness, for the canbus [green wire , yellow wire].. Did you wire the Green to a thin red wire [pin 1 from x60001] and the yellow to a blue w/purplish stripe - pin 14 from x60001] ? These wires were twisted together on my harness. Long story short, when I do this and power the car up, the tach needle 'twitches'.

I also selected MHD-n54 and N54-3.5 bar in the Reflex.. patched, and applied. Car throws that mhd-001 error constantly.

I cannot get the Reflex to go into bootloader mode, and I'm on v42.hex . Any ideas ? I guess I'm trying to be sure I followed the rev8 PDF correctly. I believe I did.

Did you use the supplied splice/taps on the can bus wires? the faults give me the impression either I have a good connection and the reflex is killing the signal or I broke a wire somehow. Funny thing is disconnecting the canbus wires removes the twitching and just leaves me with a mhd error code. I'm so confused.

did you ever figure this out? I'm having a similar issue but all I get is MHD-001, no twitching.

 

[G3RSTY7]

I’m on the same struggle. Switched to twin external gates so i can’t run boost until I’ve got this straightened out. Verified wires correct (although apparently positaps suck?), have both my reflex and Mac solenoid connected to same switched 12v wire, think that could be too much?

 

[Virtality]

@RaspberryBoundless did you ever find a solution? I'm having a very similar issue in my G20 b58tu. Tried everything up to a scope.

 

[veiss335]

I have discovered that the ethanol spike I was getting is caused by the PR coils. I put some bimmerlife coils in that I had laying around and the problem went away. Since then I was getting a misfire with the bimmerlife at high boost, high rpm on bank 1 so I switched back to the PR.
I wrapped the ethanol cable with emi sleeve and grounded both ends of the sleeve. This helped ALOT but did not completely attenuate the EMI.
I am currently working on routing the ethanol cable out the back of the DME box and into the firewall right behind the DME.
I'm going to run it behind the firewall to where the strut brace comes out from under the windshield. It is still wrapped and grounded and as far away from the coils and wires as I can get it given the length of cable I have to work with.
If this dosent work then I will be looking at new PR plug wires and then on to a b58 coil setup.

 

[Dumaurier7]

Maybe you should be looking at using a sensor ground from the DME, those are usually well protected against attenuation/ interference.

 

[veiss335]

Well, I got lucky I guess.
Routing the wire out the back of the dme box and into the firewall (drilled a hole) then out next to the driver side strut brace below the windshield and down to the sensor has completely knocked out the emi issue.
I hope this can help someone else fighting this battle.

 

[mj6234]

Probable dumb question here, but is there any risk to tapping the factory harness with the positaps? Not sure if they could end up being cut or some other unexpected issue.