E38 flex fuel pin. Interesting info: Flex Fuel Option {B01...

E38 flex fuel pin. Interesting info: Flex Fuel Option {B0178} Flex Fuel Option Yes {B0184} Flex Fuel Sensor Type Actual Sensor {B0185} Flex Fuel Default Percentage 50 % {B0186} Flex Fuel Sensor Diagnostic Enabled {B0187} Flex Fuel Diagnostic Run Time 3. Tested this on several different E38 OS's from 06 through to 08 and the pin number and results are consistent. - Note: if your stoich table has a flex fuel cal in here you need to set it to something constant across the whole table (ie. I'll post up the parameters in the tune I changed to activate the sensor . 2009 c6 m6 Any help greatly appreciated , I have a custom fuel setup with a gm sensor ,not a kit. This prevents you having to load a tune every time you change between e85 and gasoline. Information is gained by pieces from GM SI, tracing and probing disassembled ECM PCB and reverse engineering of several OSes. Note: Removing all of these will result in a non-emissions friendly harness. Each pin within the E38 ECM connector corresponds to a specific function or signal, providing important insights into the inner workings of an automobile’s engine management system. Jan 15, 2020 · C6 Tech/Performance - E38 PCM Flex Fuel Senor Install - Thanks for all the help on other posts. Does anyone know if this would work?. - I have tried searching for the ethanol content input location/pin , I can not seem to find the information I need . If we had access to these tables, could we add the sensor? Use the factory Fuel line to connect to the entry end of the Flex fuel sensor and use a 3/8 quick disconnect to connect to the other end of the sensor and then connect to factory fuel supply entering the rail. Here is a E38 complete pinout. A how-to, pics, or any other pertinent information will be greatly appreciated! C6 Forced Induction/Nitrous - Help with flex fuel sensor input location . - obviously you need to be open loop for the fuel stuff to work. Route the Flex Fuel sensor signal wire to the ECM connector and install the pin at the 38 location. PAY ATTENTION, for whatever reason, TRUCK and CAMARO have two pins swapped on gas pedal, D and F. C6 Corvette ZR1 & Z06 - E85 How-to/Information - I'm about to do a Flex fuel conversion on my Z and I'm looking for some pics or diagram on which Pin do I tap-to on the EEC. Oct 18, 2016 · Locate pin 38 and simply remove the gray plug with a pair of needle nose pliers. EFILive’s E38 / E67 Custom ECM operating systems are modified versions of the factory ECM operating system that gives users the ability to use the factory ECM to perform functions beyond what was available in stock form. Aug 17, 2025 · Has anyone ever read the voltage at pin 40 on your E38 ECM? I'm having an issue with my flex fuel sensor and was wondering if that was what I should be seeing. Throughout this article, we will discuss the different pins present in the E38 ECM connector and their respective functions. This should be the same process for any of the E38 VCM (vehicle control module) Re: Swaping E38 into VZ HSV with E40 PCM by 80gus » Wed Oct 02, 2019 10:30 am Quick google search shows people using flex fuel on a E40 its all there on every file I have opened flex fuel pin is pin 4 on the bottom connector on the E40. Product Description: This is a GM Flex Fuel sensor with a custom made harness. https://youtu. I think this is more detailed than anything I could find. 0 Seconds All these tables, and Pin 40 on the E38 ECU seems to be where the flex fuel sensor goes. Again, Pin 4, C3 why not try that first I see that in the E40 calibrations list under general spark flex fuel (ethanol) spark (b5114). When checking out, select which ECM you have from the drop down below (most will fall in the E38/E67/E92 The Flex system will auto detect the type of fuel you are running and switch to that tune. Dec 7, 2020 · On the E38 ECM, the pin position you need to use for the FF sensor wire is # 40. gas numbers) otherwise as you change the freq, the stoich will change. From What I can tell, it's not too hard to accomplish. Now if you put in say -5* in this table and could power the pin that detects ethanol it should pull that amount of timing from the total timing. 129235 Can anyone point me in the right direction for information regarding the retrofit of a GM flex fuel sensor wired to PIN 40 of my E38 PCM? I am contemplating adding the sensor to my 08 Z06 so I can run E85 and other fuels without having to run multiple tunes. So that's the overview of how to manually adjust ethanol content on the fly. BLOCKS HIGHLIGHTED LIKE THIS, ARE WIRES THAT CAN BE REMOVED FROM PCM CONNECTORS, NOT NEEDED. be/JvjhS7SwYpY. In this video I install a flex fuel alcohol content sensor on the Corvette. Mar 15, 2011 · All these tables, and Pin 40 on the E38 ECU seems to be where the flex fuel sensor goes. I don't know which pin the sensor input is on the ECM, sorry! Let me know how it goes. This is ideal for people who don't need the plumbing side of things because they're using an aftermarket fuel system or just want to do things their own way.