EFIE known as Electronic Fuel Injection Enhancers are used to help regulate or adjust the voltage on an oxygen sensor. Most of these dual EFIE circuits or EFIE circuits are to be purchased for water4gas plans or other comparable HHO plans. This module or circuit is usually added between the oxygen sensor and ECU or electronic control unit. This circuit is often added on some vehicles because when an HHO kit is installed the exhaust is so clean that the voltage produced by the O2 sensor can cause the computer to compensate by adding more gasoline to the mix thus reducing gas mileage. An HHO EFIE circuit adjuster is used to aid in this situation. Buy a EFIE Kit to ensure you hydrogen HHO generator system is working at peak efficiency.

Unique EFIE for Narroband (O2) Sensors HHO Edition Advanced No Like It On Market
Unique EFIE for Narroband (O2) Sensors HHO Edition Advanced No Like It On Market $49.95
Time Remaining: 2d 20h 31m

Digital Controller with CCPWM for HHO Kit . PWM , EFIE , IAT , MAP / MAF
Digital Controller with CCPWM for HHO Kit . PWM , EFIE , IAT , MAP / MAF $275.00
Time Remaining: 8h
Buy It Now for only: $275.00

DC7000 HHO Dry Cell Kit Complete w/ PWM, Quad NB EFIE, Educational Hobby Edition
DC7000 HHO Dry Cell Kit Complete w/ PWM, Quad NB EFIE, Educational Hobby Edition $674.95
Time Remaining: 4d 18h 46m
Buy It Now for only: $674.95

AMP GAUGE 30A 12 VOLT HHO / EFIE /30A PWM. FINE CALIBRATIONS
AMP GAUGE 30A  12 VOLT  HHO  / EFIE /30A  PWM. FINE CALIBRATIONS $9.86
Time Remaining: 20d 9m
Buy It Now for only: $9.86

HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP
HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP $93.76
Time Remaining: 15d 1h 42m
Buy It Now for only: $93.76

1999 99 VW New Beetle ZX2 OBD Fuel Saver HHO Kit EFIE Volo FS2-HHO
1999 99 VW New Beetle  ZX2 OBD Fuel Saver HHO Kit EFIE Volo FS2-HHO $95.99
Time Remaining: 23d 11h 54m
Buy It Now for only: $95.99

HHO Computer Chip Fuel Saver Efie enhancer
HHO Computer Chip  Fuel Saver Efie enhancer $90.00
Time Remaining: 21d 15h 30m
Buy It Now for only: $90.00

DIGITAL EFIE 1..4-wire O2 OXYGEN SENSOR ENHANCER ADJUSTER HHO CHIP water4gas
DIGITAL EFIE 1..4-wire O2 OXYGEN SENSOR ENHANCER ADJUSTER HHO CHIP water4gas $69.99
Time Remaining: 15d 4h 37m
Buy It Now for only: $69.99

DIGITAL EFIE 5-wire WIDEBAND O2 OXYGEN SENSOR ENHANCER ADJUSTER HHO CHIP
DIGITAL EFIE 5-wire WIDEBAND O2 OXYGEN SENSOR ENHANCER ADJUSTER HHO CHIP $79.99
Time Remaining: 15d 4h 28m
Buy It Now for only: $79.99

Dual Edge MAP MAF Sensor Enhancer HHO Water4Gas EFIE
Dual Edge MAP MAF Sensor Enhancer HHO Water4Gas EFIE $34.99
Time Remaining: 17d 8h 46m
Buy It Now for only: $34.99

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