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.

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: 27d 22h 23m
Buy It Now for only: $285.00

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: 1d 7h 36m

Dual Edge MAP MAF Sensor Enhancer HHO Water4Gas EFIE
Dual Edge MAP MAF Sensor Enhancer HHO Water4Gas EFIE $12.99
Time Remaining: 17h 53m
Buy It Now for only: $29.99

HHO Map Enhancer EFIE Map MAF MINI enhancer
HHO Map Enhancer EFIE Map MAF MINI enhancer $12.50
Time Remaining: 18d 7h 9m
Buy It Now for only: $12.50

" TWO "-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
$99.95
Time Remaining: 9d 15h 31m
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: 9d 12h 31m
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: 9d 10h 31m
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: 9d 8h 31m
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 $8.56
Time Remaining: 25d 12h 51m
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HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP
HHO ELECTRONICS FLASH CHIP SAVE FUEL GAS MPG EFIE MAP $106.29
Time Remaining: 20d 14h 24m
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