Misfire only on ethanol after installing Reflex

[sosiiick]

My old setup was running fine. I had a separate 93 and e85 tunes with PI control using an AIC2.

I installed a Motiv Reflex to run a flex tune (so I wouldn't have to switch maps all the time) , control boost, control 2nd fuel pump. I also upgraded to b58 coils. When I am only using 93 (e15) the car seems to run great. We moved on to tuning on e and now the car is breaking up. I am currently at e50 in the tank, mix of 93 and x98. I had used flex fuel from Rofo (e65) and had the same issue.

Looks to me like its running lean and I'm not getting enough fuel but my tuner said the file is good and says its something with my engine. So far installed new plugs gapped to .018, new VTT b58 coils, stretched the springs out to make sure the coils have good contact and replaced seals and decouplers on the injectors.

What is the best way to see if my PI is working correctly?

Setup:

DocRace (6266 gen 1)
Motiv Reflex
750cc PI injectors
450 walbro x2
BMP upgraded fuel lines
VTT B58 coils
VTT billet valve cover
stock IM but have a VTT billet IM on order
Index 12 injectors
Radium universal OCC
Wagner IC

datazap.me | Redline329 | Misfire only on ethanol

datazap.me

 

[KClemente]

Reflex Manual Go to page 18 and use TunerPro to run a bench test.

 

[sosiiick]

Reflex Manual Go to page 18 and use TunerPro to run a bench test.

Would I need to disconnect the fuel rail to see if the injectors actually spray when performing the bench test? I logged the reflex and it only tells me that the connect is good. It says 'Ok - No Fail' for all 6 injectors.

I emailed motiv last week. Still waiting for a reply.

 

[KClemente]

Yes, remove injectors with the rail connected and see if fuel comes out when you bench test it. Manual says 3-5ms at 50% duty cycle

 

[sosiiick]

Update:

I went back to n54 delphi coils and the car does not break up when boost kicks in now on ethanol. Car feels much better going into boost and logs look good. I found some issues with the wiring harness adaptors. New harness adaptors are being shipped out. I may just solder the b58 connector directly to my wire harness if the new adaptors still have issues.

 

[4doorbmwpower]

Update:

I went back to n54 delphi coils and the car does not break up when boost kicks in now on ethanol. Car feels much better going into boost and logs look good. I found some issues with the wiring harness adaptors. New harness adaptors are being shipped out. I may just solder the b58 connector directly to my wire harness if the new adaptors still have issues.

Do you have a log now that you got it fixed ? B58 or with the old N54 coils I am having a strange issue also. But I cant move it to another cyl so maybe wiring? not sure or leaning out on 1 cyl... its cyl 4 and only on E85

 

[sosiiick]

Do you have a log now that you got it fixed ? B58 or with the old N54 coils I am having a strange issue also. But I cant move it to another cyl so maybe wiring? not sure or leaning out on 1 cyl... its cyl 4 and only on E85

I'm still having the issue. The some of the pins on the adaptor harness were smaller just like the previous ones. It was causing a misfire at idle so I ended up just soldering the B58 connectors to my wire harness. I am still getting misfires at WOT only on e85. I replaced the VTT coils with OEM B58 coils but the metal springs in the boots are too big for the oem to have a good connection. I am waiting to hear back from Nexsus to get a set of their boots and springs and see if that fixes my issue.