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 Map Enhancer EFIE Map MAF MINI enhancer
HHO Map Enhancer EFIE Map MAF MINI enhancer $12.50
Time Remaining: 29d 11h 34m
Buy It Now for only: $12.50

MAP / MAF Sensor Enhancer - EFIE - HHO
MAP / MAF Sensor Enhancer - EFIE - HHO $45.00
Time Remaining: 25d 10h 40m
Buy It Now for only: $45.00

EFIE HHO No Volo Chip For Toyota Rav4 Aristo FS2 FS3 Hydrogen MAP PWM FUEL SAVE
EFIE HHO No Volo Chip For Toyota Rav4 Aristo FS2 FS3 Hydrogen MAP PWM FUEL SAVE $64.95
Time Remaining: 12d 3h 31m
Buy It Now for only: $64.95

HHO Computer Chip Fuel Saver Efie Enhancer
HHO Computer Chip Fuel Saver Efie Enhancer $64.95
Time Remaining: 7d 3h 43m
Buy It Now for only: $64.95

HHO EFIE AFRs (Air-Fuel Ratio Controllers) D & N Automotive Engineering
HHO EFIE   AFRs (Air-Fuel Ratio Controllers)  D & N Automotive Engineering $60.00
Time Remaining: 1d 22h 43m
Buy It Now for only: $60.00

" TWO "-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
$119.95
Time Remaining: 2d 1h 5m
Buy It Now for only: $119.95

" 2 "-HHO-HYDROGEN-DRY-CELL-GENERATORS-MODEL 4.5 DIY KIT-EFIE-CC PWM Available
$119.95
Time Remaining: 1d 22h 5m
Buy It Now for only: $119.95

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 $119.95
Time Remaining: 1d 20h 5m
Buy It Now for only: $119.95

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 $119.95
Time Remaining: 1d 18h 5m
Buy It Now for only: $119.95

AMP GAUGE 30A 12 VOLT HHO / EFIE /30A PWM. FINE CALIBRATIONS
AMP GAUGE 30A  12 VOLT  HHO  / EFIE /30A  PWM. FINE CALIBRATIONS $8.14
Time Remaining: 17d 22h 24m
Buy It Now for only: $8.14

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