Anyone know what the ECA voltage should be at. Mine sits at 1.1 and shoots to 4.46 as soon as I hit the gas a little and Ethanol goes from reading like 23% to %100.
Motiv Flex Fuel Installation Guide
- Thread starter doublespaces
- Start date
The higher the ethanol, the lower the voltage. If you are spiking, when stepping on the gas, then you have a wiring fault or your flex fuel unit is about to go bad. I had the first gen unit replaced last year under warranty and I am on the second one, which looks different than the first gen. because it has no usb tail end. I also ordered a third unit and it sits in my glovebox as a backup, because you are s.o.l if your unit goes bad and you are out far from home. Unless you do not have port injection and you can simply reflash to stock settings and limp home. If you have port injection, then you have to disconnect the port injection, reflash to stock or MHD stock flex fuel flash.
I have been talking with Chris from Motiv, they are super responsive. I'm going to do a bit more trouble shooting.
Really? Man I always saw the opposite. I must be reversing memories. Will double check later today.
I confirm that I am at 76.2 % ethanol and 2.4 voltage. Looking at MHD readings as I write this. Amd it concurs with my past observations that higher ethanol makes for lower voltage. So I don't know why your observations are the opposite. Is there a setting I am unaware of?
4V, 4.5V, and 5V are error conditions and do not count. The main voltage to ethanol scale is 0.5V - 3V (or 3.5V I forget off hand), which correlates to 0-100% E. So in the actual range, the higher voltage is higher ethanol. 4V and above are not proper readings and mean you have a hardware or wiring issue.
Thanks @doublespaces, I appreciated the guide. It helped me get the wiring mostly done tonight.
I've had the flex fuel sensor hooked up for a while, although I kinda wish I ran the wire to it after I did the wiring under the ECU box. Need to figure out how to get it into my ecu box and also need to go buy some positaps.
I've had the flex fuel sensor hooked up for a while, although I kinda wish I ran the wire to it after I did the wiring under the ECU box. Need to figure out how to get it into my ecu box and also need to go buy some positaps.
Motive sent me a new wiring harness and I installed it, just like it was before. Double and triple checked that is was wired correctly.
Started the car and idle is wildly jumping and throwing codes. E was pegged at 100% and ECA was reading 3.3.
Really want to drive this car so any help will be deeply appreciated.
- DME active codes -
2CFA - DME: Throttle-valve potentiometer 2.
2CFB - DME: Throttle-valve adaptation value.
2D09 - DME: THROTTLE.
2D1D - DME: Accelerator-pedal module, pedal-position sensor 1, voltage supply.
Started the car and idle is wildly jumping and throwing codes. E was pegged at 100% and ECA was reading 3.3.
Really want to drive this car so any help will be deeply appreciated.
- DME active codes -
2CFA - DME: Throttle-valve potentiometer 2.
2CFB - DME: Throttle-valve adaptation value.
2D09 - DME: THROTTLE.
2D1D - DME: Accelerator-pedal module, pedal-position sensor 1, voltage supply.
I am but the problem is this is a base map for my new Turbos, and my tuner is sick.....
Maybe I will just reflash and see what happens.
I have MSD81
This was just starting the car, it's not drive-able. In fact, just re flashed my map and now it won't start.
Maybe I knocked a wire off somewhere. I will have to retrace my steps again once it warms up. Thanks for the help langsbr.
You already reset all adaptations including the throttle adaptation and then turn on accessory position, waited 30 seconds and then started the car? If so, there is a mixed wire.
The wire can be laid on top of the seal between the lid and seal and it should seal fine when you lock the lid down. That's how I did it.
Yep, reset idle, throttle and octane adaptations. I did not wait 30 seconds though. I am leaning towards a mixed up cable. I am going to start retracing but it's still pretty cold outside.
It's wired correctly.
Green to pin 16 on short connector
Orange to 25 on long
and Yellow to 10 on long
Power and ground.
IDK, what I am missing.
Green to pin 16 on short connector
Orange to 25 on long
and Yellow to 10 on long
Power and ground.
IDK, what I am missing.
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