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.

HHO Digital EFIE 04 and 30A PWM
HHO Digital EFIE 04 and 30A PWM $79.99
Time Remaining: 6d 6h 16m

Dual EFIE (Electronic Fuel Injection Enhancer) Oxygen Sensor Control HHO Device
Dual EFIE (Electronic Fuel Injection Enhancer) Oxygen Sensor Control HHO Device $84.95
Time Remaining: 2d 38m

Quad EFIE (Electronic Fuel Injection Enhancer) Oxygen Sensor Control HHO Device
Quad EFIE (Electronic Fuel Injection Enhancer) Oxygen Sensor Control HHO Device $104.95
Time Remaining: 2d 38m

AMP GAUGE 30A 12 VOLT HHO / EFIE /30A PWM. FINE CALIBRATIONS
AMP GAUGE 30A  12 VOLT  HHO  / EFIE /30A  PWM. FINE CALIBRATIONS $9.83
Time Remaining: 27d 22h 46m
Buy It Now for only: $9.83

HHO Digital EFIE 04
HHO Digital EFIE 04 $59.99
Time Remaining: 6h 45m

HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP AIR/FUEL RATIO MODULE
HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP AIR/FUEL RATIO MODULE $75.00
Time Remaining: 20d 12h 34m
Buy It Now for only: $75.00

Electronic Fuel Injection Enhancer- EFIE for Narroband (O2) Sensors, HHO Edition
Electronic Fuel Injection Enhancer- EFIE for Narroband (O2) Sensors, HHO Edition $89.95
Time Remaining: 5d 16h 19m
Buy It Now for only: $89.95

HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP
HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP $125.02
Time Remaining: 23d 19m
Buy It Now for only: $125.02

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: 1d 10h 31m
Buy It Now for only: $95.99

HHO Computer Chip Fuel Saver Efie enhancer
HHO Computer Chip  Fuel Saver Efie enhancer $102.00
Time Remaining: 29d 14h 7m
Buy It Now for only: $102.00

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