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> Training > Advanced Drivability Diagnostic Strategies


Advanced Drivability Diagnostic Strategies

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Table of Contents

Flowcharts starting you in the wrong place, take too much time to follow?

Try the ATG Diagnostic Path!  Read a sample section.

It is a field tested and proven method that will help you stop doing any tests that can't result in a fix.

If you have the discipline to use the ATG Diagnostic Path on each drivability complaint you will greatly trim diagnostic times on no-starts, trouble code diagnostics, and even emissions faults.

With the ATG Diagnostic Path you will first determine what isn’t wrong!

From there it is a matter of continually narrowing down to just a few possible causes to test.

Don't have a scope? Most of the initial tests can be performed with a simple generic scan tool.
As explained and demonstrated in the book, transducers, lab scopes, and enhanced scan tools are required for some tests.

The ATG Diagnostic Path focuses you on determining what isn't wrong with the three main functions of the engine and then helps you target the cause.

278-pages, 8-1/2" x 11", soft cover.

This manual applies to any vehicle with driveability problems.  It does not re-hash the information you already have in your electronic systems.


Table of Contents

SECTION 1 Introduction
· The Diagnostic Process
· Scan Tools
· Lab Scopes
· Probes & Jumpers
· Symptom Tables

SECTION 2 Cyl. Contribution & Ignition
· Misfire Detection
· Scan Tool Diagnostics
· Exhaust Pulse Testing
· 5-Gas Misfire Testing
· Primary & Secondary
· Current & IC/Feedback

SECTION 3 Engine Fueling
· Adaptive Fuel Control
· Rear Fuel Trim
· Exhaust Leaks
· Oxygen Sensors
· Wide-Range Sensors
· Pressurization & Injection
· 5-Gas No-Start Testing

SECTION 4 Base Engine & Breathing
· Finding Vacuum Leaks
· Finding Breathing Faults
· MAP & MAF Testing
· Volumetric Efficiency
· Mechanical Testing
· Relative Compression
· In-Cylinder Transducers
· Intake Transducers
· Crankcase Transducers


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