On the other hand, the tiny Continental sensor is rather hard to put anywhere in the engine bay without it looking cludgy. This sensor already has 3 useable mounting holes. This is the point where all of your decisions leading up until this point come to fruition in application. Fuel Composition Sensor. I only hope this thread helps at least 1 person install and understand the process of adding Flex Fuel to their car. Although some other vendors seem to use the Continental sensor (Haltech and AEM come to mind), you typically overpay for them. As with anything you read online, this write-up should be taken as reference material only. So that ECM can make changes to variables like ignition timing and fuel delivery in order to obtain better performance from fuels containing different proportions of ethanol.
Supplies Required: None additional. The sensor has a pre calibrated signal that is sent from the sensor in a 0-5v voltage indicating which amount of alcohol is present. GM Flex Fuel E85 Fuel Composition Sensor Pigtail. Don't attempt anything you are not absolutely comfortable with, and always respect common sense principles of safety. I'm writing a more in-depth response to his question, but thanks for the acknowledgment. The rear of the connector (wire side) has gray dummy pins in all the unused slots.
Pin Type: Molex MX64 Socket For all the research I did on this topic, this information was the most difficult to find. Gasoline and ethanol are both volatile liquids, and a gasoline fueled fire is a quick route to a bad day. The fuel composition sensor determines how much ethanol is present in the fuel and also measures the ethanol-to-gasoline ratio. The basic install requires no specialized tools and takes all the "hard" parts out of the installer's hands. A Flex Fuel sensor measures the ethanol-gasoline ratio of the fuel being used in a flexible fuel vehicle. 4pc billet 6061 aluminum construction. David's correct, I was overthinking it. These sensors are manufactured by Continental and are found on 2006 and newer vehicles. Gm flex fuel sensor location on car. Although it can be mounted virtually anywhere, it is generally considered a good practice to rigidly mount it in a vertical position with fuel feed entering the left barb and exiting the right. 10AN (5/8") equivalent flow rate. A flex fuel engine's fuel composition sensor circuit keeps track of how much ethanol is present in the gasoline. Quench the hose end with cold water and the union becomes very solid. There is some speculation over how much ethanol this line can take and for how long it will take it; I do not consider this an ideal long-term solution for a couple of reasons (length mostly), but it will get you started with your plumbing. Placing the sensor on the surge tank loop would work fine as well, however during a rapid change in ethanol content (switching from gasoline to E85, for example), the sensor could detect the change before that fuel actually reaches the engine.
This is important since the flex fuel sensor is telling your ECU how to adjust the tune based on the ethanol content. I think I'd try a fresh tank of gas from a different vendor first... make sure its just not bad gas.... Also if you have not tried, just clear or reset the error to see if it returns... Last edited by in2pro; April 22nd, 2013 at 12:18 PM. Please verify your ECU is capable through manufacturer before purchasing or attempting to install a flex fuel sensor. If a defect is determined, the defective part will be replaced at no additional cost to you, or if you prefer, we will provide a full refund. The e85 does seam to free up a bit of debris from my old tank. The car will deliver enough fuel for what would be probably 12. Anyone got a hookup up there and can score me a couple? Gm flex fuel sensor an fitting. Why is this a problem? The flex fuel sensor uses quick-connect style fuel connections, an incoming fuel connection, and an outgoing fuel connection. The e85 composition is a frequency whist the temp is voltage... or something like that. As with all our products, BP Automotive uses production presses and production tooling to terminate ALL connections for an EXACT crimp, just like a factory GM harness. To replace the the Flex Fuel Sensor, a new one will cost you roughly between $400.
Please note sensor power and sensor ground wires must be supplied from the ECU, noise and incorrect signals from power and ground outside of the ECU will create an unreliable signal and false data. Works great with Haltech, Nistune, and Zeitronix systems. A lambda value of 1. The flex fuel sensor measures the fuel alcohol content and sends an electrical signal to the engine control module (ECM) to indicate ethanol percentage. SAFE AND SECURE PAYMENT METHODS. So how exactly do they work, and why do I not think it's an adequate method for our purposes? 13507129 - Fuel Composition (Flex Fuel) Sensor (E85. And if you are curious about how to install a flex fuel sensor, continue reading this article till the end. Using its signal pin, it pulses a square wave to the 5V signal wire of the ECU to deliver ethanol content.
As with the wiring, take your time and make good connections. Socket terminal (22-20 AWG) x 4 (one extra provided). Because this is a non-factory install I chose to avoid this style for my own build. The E78 (Sonic) ECU is equipped to "sense" ethanol in this way, but no tuner would recommend it. So I mounted the sensor in the boot beside my swirl pot and was going to put it on the return line there. Join Date: Nov 2006. Although the connector, pins, and wire can be bought separately (thus eliminating the need for any soldering), minimum orders make this route prohibitive. Gm flex fuel sensor location picture. What Does a Fuel Composition Sensor Do? From here, take your last length of wire, and connect it to the remaining pink lead (bottom) from the flex fuel sensor.
This means that you effectively may have 10 different octane levels. You must come from the front with the terminal because the connector will not allow the terminal to pass through from the rear. The basic install repurposes the factory fuel line that typically runs from the firewall-mounted hardline to the fuel rail, and uses it to connect the inlet of the flex fuel sensor to this feed line at the firewall instead. In my area E15 costs 70 cents a gallon less than the premium I typically run. EXXX- E prefix means ethanol, number value behind indicates percent of ethanol in the fuel. I wish I could give proper credit to all those who posted valuable information for this project. Hey folks, I recently took on an adventure in the Silverado and now that it's over I'm taking a close look at the bottom of this beast. Note- If wire nuts cross your mind at any point while reading this section, then this install is not for you.