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OBDII Technical Library

We're pleased to bring you this growing collection of articles to explain all things OBDII for the DIYer, performance enthusiast and professional technician.

Diagnosing an Engine Misfire
Diagnosing Light-Duty Diesels
Diagnosing Misfires
Diagnostic Flow Charts…Do They Always Work?
Distributorless Ignition Systems (DIS)
Introduction to Emissions Systems
Introduction to Engine Management Systems
OBDII and Emissions Testing
OBDII: Past, Present and Future
Onboard Diagnostics Demystified
Preventive Maintenance: Fluids and Filters
Replacing Oxygen Sensors for Preventive Maintenance
Spark Plugs for the Home Mechanic
What the Home Mechanic Needs to Know About O2 Sensors
What's A Tune-Up Today?
When To Replace Your PCM (And When Not To)

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