Automotive Diagnostics Learn your fundamentals

Using Fuel Trim After a Repair. Did you fix it?

This is the most FRUSTRATING and most REWARDING field

This Is Why Fundamentals Beat Flowcharts!

Using a Wideband O2 at WOT [Fuel Delivery Test]

How To Quickly Identify A Shorted Secondary Winding!!

Stop Wasting Your Time With Flow Charts

I can't believe what we found on this

This Was A Tough Call To Make!

The Injector Test That Fooled Me

Why You MUST WAIT Before Parasitic Drain Testing

No Current Flow, No Voltage Drop!

This is why it's so important to check your contact points!

Coil vs. Plug: What Failed? [Proven Diagnostic Test]

I've never seen this on a GM before!

We fixed the parasitic drain, but now it's not charging...

Mechanic Abilities - You Either Have it Or You Don't

2 Separate Problems Within The MAF Circuit?

I Thought This Was A Parasitic Drain...