Scott Weaver, Author at Tomorrows Technician
Shifty Battery Drain

Let’s go into the shop for a first-hand look a 2012 Ford F150 with a battery drain and no remote start.

HFO-1234yf: What’s Required

Unless you’ve been living under a rock, you might have heard about the new regulations and requirements for R-1234yf usage. Not sure? Well, it’s time you crawled out from under that rock and get ready for some of these new regulations that will affect you and your profession.

Understanding Diesel Exhaust Filters

The Diesel Particulate Filter (DPF) is a ceramic filter that has thousands of tiny channels or honeycomb-shaped openings that trap the soot onto the channel walls and prevent the particulate matter (down to 1 micron) from exiting out the tail pipe.

Electronic Throttle: Where’s The Cable?

Today, virtually every manufacturer has an electronic throttle system on board every make and model. That old throttle cable is a thing of the past.

2013 Ford: No Radio, No A/C, Airbag Light On

How many times have you been working on the computer when it suddenly locks up? Not one single key or command works, and the more you click, the less it responds.

Starter And Theft Deterrent System Diagnostics

Today’s vehicle can have numerous additional features to the starting systems. Remote start, auto start and auto cranking are just a few. And, with a lot of these systems, an anti-theft system is directly involved with the operation of the starter motor.

Car Diagnostics And Testing: Proper Shop Procedures

Sometimes accuracy isn’t all that important, such as in a game of horseshoes or when tossing a hand grenade. But the same can’t be said for diagnosing today’s cars.

Getting Grounded: Positive And Negative Energy Sources

When it comes to electricity, there are two potential energy sources you have to keep in mind. One, being the positive side, and the other, the negative side.

Diagnosing Vehicle Signal And Chassis Ground

When it comes to electricity, there are two potential energy sources you have to keep in mind. One, being the positive side, and the other, the negative side. Just like a magnet, these two opposite forces react the same way. That is, two positives or two negatives will not meet, while a positive and a negative source of energy will attract each other. This attraction will continue until all the potential energy is equalized.

Secondary Ignition: The Art Of Spark

From the beginning of the internal combustion engine, several different ignition systems have been used to create a high-energy spark. The most popular system, and the one that’s in use today, is a step-up coil.

Oil-Related Engine Codes For Variable Valve Timing Engines

Variable valve timing is becoming a standard system on most late-model engines because it offers higher performance from a smaller displacement engine at higher rpms. Oil plays a larger role in VVT systems. They need engine oil not only for lubrication, but also to actuate the camshafts to change the profile of the lobes.

Pattern Failures Of MAF And MAP Sensors

Pattern failures are those failures that happen over and over again – and the same applies to how customers describe these failures. Customers might unknowingly give you the answer to their problem without needing to open the hood. In this article, we will look both at the failures of these sensors and the actual customer explanations that directly related to a failed MAP or MAF sensor.