WIDE-BAND OXYGEN SENSOR CONSIDERATIONS
The WEGO IIID wide-band oxygen sensor interface module used with TCFI III system has provision for checking and recalibrating the Bosch LSU 4.2 wide-band sensors by means of diagnostic LEDS and adjustment trimpots. This is referred to as free air calibration as it is done with the sensors in free air. Accuracy of the sensors can be maintained as the sensors age or if they start to degrade from exposure to leaded racing gas or other fuel additives. The ThunderMax® auto-tune module has no such capability. Without using some type of calibration gas, the user has no means of checking the sensor output or recalibrating the sensors. If sensor errors are suspected, the only approach is hit-or-miss replacement. In all fairness, the Bosch sensors are very reliable and capable of many thousands of miles of operation without significant degradation when used with unleaded pump gas.
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Daytona Twin Tec LLC, 933 Beville Road, Suite 101-H, S. Daytona, FL 32119 (386) 304-0700 www.daytona-twintec.com Page 8
TCFI III & TMax Comparison 4/2011