Bill Fulton

Bill Fulton

Bill Fulton is the author of Mitchell 1's Advanced Engine Performance Diagnostics and Advanced Engine Diagnostics manuals. He is also the author of several lab scope and drivability manuals such as Ford, Toyota, GM and Chrysler OBD I and OBD II systems, fuel system testing, many other training manuals in addition to his own 101 Lab Scope Testing Tips. He is a certified Master Technician with over 30 years of training and R&D experience. He was rated in the top three nationally on Motor Service magazine's Top Technical Trainer Award and has instructed for Mitchell 1, Precision Tune, OTC, O'Reilly Auto Parts, BWD, JD Byrider, Snap-on Vetronix and Standard Ignition programs. You may have also seen Fulton in many Lightning Bolt Training videos and DVDs and read his articles in many auto service magazines. He currently owns and operates Ohio Automotive Technology, which is an automotive repair and research development center.


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The Benefits of Current Ramping

Current ramping is an easy art to learn and returns many good returns. Virtually every 12 volt output device that is controlled by the PCM can be current ramped by using the low inductive current probe non intrusively by simply clamping around the voltage feed wire or the ground side control wire.

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The Diagnostic Value of the DSO

Digital Storage Oscilloscopes and Their Benefits

During my five plus decades of being in the automotive service and repair industry I have learned that diagnosing an engine performance problem, drivability problem or electrical problem is not an exact science. I have always favored symptom-based diagnostics, where once we have identified the symptom we focus our testing on a specific area

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Mastering the Multimeter

Use All Functions to Your Advantage

All technicians are aware that the scan tool holds the No. 1 priority in our initial diagnostic strategies. In my personal experience, the No. 2 tool in diagnostics is the DVOM, known as the digital volt-ohm meter or multimeter. In the event of an electrical problem, the DVOM is the essential tool.

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Diagnosing Intermittent Drivability Issues

Strategies for Detection and Repairs

We as automotive technicians all get the intermittent problems or symptoms from a customer’s car that we know can take a lot of diagnostic time to duplicate the symptom and a lot of diagnostic tests. Even so, there are times in all of our encounters when we are forced to make a judgment call as to what component we may feel is causing the intermittent problem.

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Understanding Individual Cylinder Fuel Control

We Break Down This Engine Management Strategy

If we go back to the early electronic fuel injection, (EFI) systems known as batch-fired injectors or what was called simultaneous EFI systems, the bank 1 injectors were all fired together. The next engine revolution resulted in the powertrain control module (PCM) group firing the injectors from bank 2. When an injector electrically lost its resistance value or had a problem called pintle distortion, it created a rich condition on that specific cylinder and bank.

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Anatomy of a Waveform

Diagnostic Value of Scope-checking the Ignition System
We are going to cover the diagnostic value of scope-checking the primary side of the ignition system on a voltage trace and by using a low inductive amp probe to monitor coil charge values and analyze ignition events.
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The Anatomy of a Waveform

Understanding How a DSO Can Improve Diagnostics
You have certainly heard the phrase that “a picture is worth a thousand words of information.” That especially is true on lab scope waveforms from both sides of the ignition system as well as input sensors and output devices.
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