Flex Fuel Composition Sensor (HT-011000)

This is the sensor that makes flex fuel tuning work. Plumbed inline in the fuel supply, it continuously measures the ethanol percentage and temperature of the fuel actually flowing to the engine and reports both to your Haltech ECU. With that signal connected, the ECU blends fuel volume, ignition timing, and boost targets by ethanol content automatically, so the car runs correctly on straight pump gas, E85, or any mix in between without touching the laptop.

What You'll See

Live ethanol content as a channel on your dash, in your logs, and in ESP or NSP while tuning. No more guessing what the last fill actually was: if the E85 at the pump is really E70 that week, the number on screen says so and the ECU compensates before it ever becomes a knock event. Fuel temperature comes through on the same sensor, giving your tuner one more channel for diagnosing hot restart and heat soak fueling. For a boosted flex fuel build, this single input is the difference between one calibration that covers every fuel and a folder of maps you have to swap manually.

Features

• Measures ethanol content from E0 to E100 plus fuel temperature in one sensor
• Direct digital input to Haltech Elite and Nexus flex fuel inputs, no interim module needed
• Enables tuning of fuel, ignition, and boost by ethanol content
• Inline installation using 3/8" GM Spring Lock fittings
• Matching connector plug and 3 pins included for a clean harness termination

The Details

• SKU: HT-011000
• Fittings: suits 3/8" GM Spring Lock
• Output: ethanol content and fuel temperature
• Adaptor fittings to suit AN plumbing are available separately

Kit Includes

• Flex fuel composition sensor
• Matching plug and 3 pins

Applications

Universal fit for any flex fuel capable Haltech installation: Elite 750 through Elite 2500 T, Nexus S and R series, and Elite PRO Plug-in ECUs. Plumb it in the feed line between tank and rail, wire the three pins to the flex input, and enable flex fuel in the software.

Tuned By Shawn is a Platinum Haltech Dealer. If you are adding flex fuel to an existing Haltech tune, a remote session over live Zoom is the fastest way to get the blend tables set up and verified on your car.