WEGO IV Wide-Band Air/Fuel Ratio (AFR) Tuning Aid

 

· Complete air/fuel ratio metering system with built-in data logging. Includes WEGO IV unit shown above, Bosch LSU4.2 5-wire wide-band oxygen sensor, sensor wire harness, 18x1.5mm weld nut for mounting sensor on exhaust pipe, and software on CDROM

· Versatile tuning aid for all carbureted and fuel injected engines displays air/fuel ratio (AFR) and logs over 2 hours data including AFR, engine RPM, and a spare 0-5V analog input for sensors such as throttle position or manifold pressure

· Can be used for on-road or dyno testing

· Suitable for automotive, motorcycle, and other small engine applications

· Highly accurate with less than ±0.10 AFR error over 10.3 - 19.5 AFR range

· Easy free-air calibration procedure corrects for sensor aging effects

· 0-5V analog AFR output for interface to dyno instrumentation

· Ultra-bright daylight readable blue LED display with automatic dimming under low light conditions

· Wide supply voltage range from 11-16V allows operation from battery on small engines or race vehicles without an alternator. Current draw is approx. 1 amp

· Built-in USB interface

· Attractive black anodized aluminum housing

· Industrial grade clamping terminal block on rear panel allows easy hookup

· Compact size: 3.3"L x 2.1"W x 0.9"H

Visit our Tech FAQ and find out more about engine tuning with the WEGO!

The WEGO IV is a fourth generation product that utilizes the proven Bosch LSU 4.2 wide-band exhaust gas oxygen sensor.  

By utilizing miniature surface mount electronics technology, digital signal processing techniques, and a switching power supply for the sensor heater, the WEGO IV provides the same level of accuracy as lab systems costing thousands of dollars.

Wide-Band Oxygen Sensor on Front Pipe

Download WEGO IV Installation Instructions 

Data Logging Software

The WEGO IV features data logging and includes a built-in USB interface for easy connection to newer laptop PCs. This data logging capability greatly facilitates engine tuning and diagnosis of driveability issues. The WEGO IV can store data for over 2 hours of operation. You can use our WEGO Log software to download and display this data on a chart recorder type screen. Available data includes air/fuel ratio (AFR), RPM, and a 0-5V analog input.  The RPM input can be connected to a tachometer signal or directly driven from an ignition coil. RPM data is correctly scaled and displayed for 1-12 cylinder engines. The analog input can be connected to sensors such as throttle position or manifold pressure. Analog data can be scaled to display the correct units, such as percent throttle position or In-Hg manifold pressure. 

The data logging software, WEGO Log, runs under Microsoft Windows 98/ME/XP/Vista. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). For more detailed product information, we suggest that you download the WEGO Log software and instructions. The software download includes a sample file with actual data.

Data Logging Chart Display

AFR Data Analysis

AFR (air/fuel ratio) table display is only possible when both engine RPM and correctly scaled throttle position sensor (TPS) data has been logged from a fuel injected vehicle. The table format is intended to match the RPM rows and TPS columns used by Dynojet Power Commander (PC) systems. The figure below shows logged AFR data.  

AFR Data Display

You can also display and print out the required fuel correction (in percent) based on the AFR target value you select. You can add data from an unlimited number of files that you previously saved. The data will be analyzed and incorporated into the table. Cells that vary more than ±0.5 AFR from the command value are shaded blue for rich or red for lean.

Fuel Correction Display

You can easily make the required corrections in the Power Commander program by referring to the printed fuel correction table and marking off cells as you edit them. The figure below shows a typical Power Commander fuel table. For more details, please download and read the WEGO Log instructions. 

Typical Power Commander Fuel Table

The data logging software, WEGO Log, runs under Microsoft Windows 98/ME/XP/Vista. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). The WEGO IV connects to the PC by means of a USB interface. A USB cable is supplied with the unit. The PC must have a free USB port. If you have an older PC without USB capability, you cannot use the WEGO IV. For more detailed product information, we suggest that you download the WEGO Log software and instructions. The software download includes a sample file with actual data.

Download WEGO Log Software and Instructions 

Suzuki^® Hayabusa Applications

Please read the Hayabusa Tech Note. This tech note provides WEGO hookup and setup information for Suzuki^® Hayabusa applications. 

Exhaust Sniffers 

WEGO units can be used with easily fabricated exhaust sniffers that allow temporary installation on most automobiles and motorcycles for tuning and diagnostic purposes, including vehicles with catalytic converters. The exhaust sniffers are constructed from materials that are readily available at any hardware store. For more details refer to the Automotive Exhaust Sniffer Tech Note  and Motorcycle Exhaust Sniffer Tech Note.

Automotive Exhaust Sniffer

Automotive Exhaust Sniffer Installation

Motorcycle Exhaust Sniffer

Motorcycle Exhaust Sniffer Installation

Part Number	Description	Suggested Retail
WEGO4-SYS	WEGO IV Wide-band Exhaust Gas Oxygen Sensor System (includes WEGO IV unit, Bosch LSU 4.2 oxygen sensor, 96" sensor harness, 18 x 1.5 mm weld nut for exhaust pipe, and software on CDROM)	$399.50
WEGO-TACH-ADAPT	WEGO Tach Adapter (required when using WEGO4-SYS on motorcycles with CD type ignition)	7$50.00
WEGO-CBL-12	Extension Cable for WEGO IV (12 foot extension cable from Bosch LSU 4.2 sensor to WEGO IV for dyno room installations)	$28.00
EGO-LSU42	Wide-band Exhaust Gas Oxygen Sensor (replacement Bosch LSU 4.2 sensor with special connector for WEGO II, III, and IV series. Note: cannot be used with original WEGO system)	$99.50
USB-CBL-10	USB Extension Cable (10 foot type A male to female cable for use with WEGO IV)	$9.50

 

WEGO Accessories	Part Number/Description	Suggested Retail
	EGO-WELD-NUT 18 x 1.5 mm Weld Nut (for mounting wide-band sensor on exhaust pipe)	$5.25
	EGO-PLUG 18 x 1.5 mm Hex Socket Plug (mates with 18 x 1.5 mm weld nut. Allows removing oxygen sensor)	$5.25