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.

Dual Edge MAP MAF Sensor Enhancer HHO Water4Gas EFIE
Dual Edge MAP MAF Sensor Enhancer HHO Water4Gas EFIE $29.99
Time Remaining: 6d 22h 36m
Buy It Now for only: $29.99

EFIE Dual Oxygen Sensor Fuel Saver, hho dry cell kit
EFIE   Dual Oxygen Sensor Fuel Saver, hho dry cell kit $59.00
Time Remaining: 16d 16h 51m
Buy It Now for only: $59.00

Digital Controller with CCPWM for HHO Kit . PWM , EFIE , IAT , MAP / MAF
Digital Controller with CCPWM for HHO Kit . PWM , EFIE , IAT , MAP / MAF $285.00
Time Remaining: 16d 15h 23m
Buy It Now for only: $285.00

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: 16d 14h 12m
Buy It Now for only: $275.00

HHO Digital EFIE version 041
HHO Digital EFIE version 041 $59.99
Time Remaining: 29d 3m
Buy It Now for only: $59.99

" TWO "-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
$99.95
Time Remaining: 7d 20h 33m
Buy It Now for only: $99.95

" 2 "-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
$99.95
Time Remaining: 7d 17h 33m
Buy It Now for only: $99.95

DUAL-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
DUAL-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available $99.95
Time Remaining: 7d 15h 33m
Buy It Now for only: $99.95

TWIN-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
TWIN-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available $99.95
Time Remaining: 7d 13h 33m
Buy It Now for only: $99.95

AMP GAUGE 30A 12 VOLT HHO / EFIE /30A PWM. FINE CALIBRATIONS
AMP GAUGE 30A  12 VOLT  HHO  / EFIE /30A  PWM. FINE CALIBRATIONS $9.20
Time Remaining: 23d 17h 53m
Buy It Now for only: $9.20

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