Klondike Darol's AFR Circuits

Wideband • Narrowband
Diesel EFIE • Air Fuel Ratio Fuel Savers Circuits

WE HAVE PROVIDED ALL OF DAROL'S E-BOOKS ON HIS CIRCUITS
FORM THE LAST 17 YEARS OF HIS RESEARCH.

updated 1/2/2025

NarrowBand T-101 Air Fuel Ratio Control

WideBand T-101 Air Fuel Ratio Control

NarrowBand MAF/MAP (2 in 1 combo) AFR Control

WideBand Combo MAF/MAP (2 in 1 combo) AFR Control

GM V6 & V8 Frequency Based AFR Control ( discontinued)

DIESEL EFIE/AFR Control

All Install Instructions are below.

DAROL'S E•BOOKS - PDF's
DOWNLOAD & LEARN FILES

Oldie but Goodie .pdf files of info. written by Darol Mason
from D & N Engineering ( 2001 till 2012)

2.5 Volt Bias on Chrysler/Dodge O2 sensors

2012 Wide band Instructions

Darol's Cleansing Instructions

Bob Boyce™ Cleansing & Conditioning Instructions

Geroge Wisemen's Post

HHO Generators

Locate your O2 sensor signal wire

MAF / MAP Enhancer

Modified T-Stat on the T-101 AFR Control Center

Modified Tuning T-101 WideBand

OBD I Vehicles

Sensor Effects and Percentages

T-Stat NarrowBand Instructions

Tuning 101 Part 1

Tuning 101 Part 2

Tuning Tips

Darol's Volo Comparison

Hydrogen Garage's Volo Comparison

More of Hydrogen Garage Install Instructions.

Buddy's Fuel Vaporizor Instructions

Get your engine ECM wiring diagram, wire color codes from
All Data. for $19.00

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Scanguage 3 • Scanguage 2 • AFR gauge monitor (Air/Fuel Ratio)
Scantool & monitor in one (clears engine codes)

Scangauge D (diesel, 6 & 9 round pin)

Air Fuel Ratio Monitor /MAF/MAP/CT & AIT temp/ RPM/ MPG
ECM Monitor Gauge • A must for these EFIE adjustments

Download the manuals for Darol's 2017 EFIE & MAP/MAP circuits :

2016 Modified T-101 / 2017 Wideband AFR

Modified Tuning 101 WB • WideBand Combo ( OBDI 1987-1995)

Tuning Tips 1 / Tuning Tips 2 / NarrowBand AFR 101

Update NarrowBand * NarrowBand Combo ( OBDI - 1987 to 1995)

Sensor Effect %'s / GM Freq. based / T-101 for GM Package

DIESEL EFIE / Locate O2 Sensor wire 

Automotive Terms Glossary

Hydrogen Garage Store

One out of 100 HHO cell systems worked!! says
HHO Skeptic CARB/EPA Dyno Lab Consultant. 3/12

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Hydrogen Garage • California • USA

updated 1/2/2025