Articles by G. Jerry Truglia

In this article, I’ll talk a bit about everything from the routine oil change to the diagnostic problems that were caused by the lack of proper maintenance.
A few comebacks are caused by faulty parts or an honest mistake made during the repair process. But many are the result of basic flaws in the diagnostic process, made in the very beginning that doomed the repair from the start. 
Your game plan needs to start with a route on where and how to proceed in diagnosing the problem at hand. We all have different ways to diagnose a problem vehicle, but there may be a better route to follow.
Do you go for the “fast fix,” or do the homework and go for a permanent one?
Fuel control plays an important part in the engine management system’s ability to deliver, control and keep emission levels at specification. 
The Digital Multimeter (DMM) and Digital Storage Oscilloscope (DSO) both can be used to measure voltage, but the way each displays that voltage reading, and what you can learn from it, is very different. 
Many technicians might not be familiar with a Megohm, aka Megger meter, but it’s not all that different from your Digital Multimeter’s (DMM) ohm meter.
Do you shy away from customers that come to you with a transmission complaint? Today, nearly everything on the car is electronically controlled, and the transmission is no exception.
Case study No. 1 is a 2001 Mazda Protegé that had a bunch of transmission P07XX Diagnostic Trouble Codes (DTCs) and a problem with a hard shift.
Not everyone understands EVAP systems especially if they have to diagnose and repair one on a BMW.