Gary Goms Archives - AutoSuccessOnline
LTF and STF Fuel Trim Feedback Loops: Rich, Lean and in Between

Air/fuel ratios can range from 13:1 to 22:1, but no matter what the ratio, there’s a fuel trim cell that addresses them.

Emission Systems: How Catalytic Converters Operate

An ignition system misfire is the most common cause of catastrophic converter failure. Here’s what you need to know.

How Technology is Changing Charging System Diagnostics

Here’s what you need to know to better understand the concept of computer-controlled charging systems.

Cooling System Design

Given the advanced state of internal combustion engine (ICE) technology, some recent cooling system innovations will actually increase engine torque and fuel economy while reducing exhaust emissions. Let me simplify that idea: new cooling system technology will make ICEs run better and cleaner. So, let’s get review some basics.

Diagnosing, Servicing & Replacing Batteries

It’s all about amp/hours — how to recognize plate sulfation when we see it.

Giving it the Gas: Rethinking Fuel Pump Diagnostics and Sensors

In many cases, “always done it this way” consists of diagnosing a fuel pump by squirting some type of liquid or gaseous hydrocarbon into the air intake. Case in point, a 2011 Nissan Rogue had suddenly stalled on a busy summertime highway.