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: 4d 10h 19m

Digital Controller with CCPWM for HHO Kit . PWM , EFIE , IAT , MAP / MAF
Digital Controller with CCPWM for HHO Kit . PWM , EFIE , IAT , MAP / MAF $295.00
Time Remaining: 28d 42m
Buy It Now for only: $295.00

HHO Digital EFIE version 041
HHO Digital EFIE version 041 $59.99
Time Remaining: 22d 21h 25m
Buy It Now for only: $59.99

NEW HHO Computer Performance Chip Fuel Saver Efie Enhancer MAP MPG HP Hydrogen
NEW HHO Computer Performance Chip Fuel Saver Efie Enhancer MAP MPG HP Hydrogen $90.00
Time Remaining: 12d 7h 52m
Buy It Now for only: $90.00

" TWO "-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
$99.95
Time Remaining: 1d 17h 55m
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: 1d 14h 55m
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: 1d 12h 55m
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: 1d 10h 55m
Buy It Now for only: $99.95

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: 2d 9h 52m
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 $9.19
Time Remaining: 17d 15h 15m
Buy It Now for only: $9.19

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