High Pressure Direct Injection Fuel Systems
The main destroyer of high-pressure fuel pumps is a lack of oil changes.
Spark Plug Fouling
Understanding why plugs get dirty.
Quality Triumphs!
New technologies have changed how we interact with our cars. Now, replacement parts quality matters more than ever.
Diagnosing Driveability Problems
Understanding what comes out through the exhaust valve is critical to solving any emissions or driveability problem.
Scan And Scope Diagnostics
Using a scan tool to communicate with different modules can confirm operation and the source of communication codes.
Repairing Wiring Harnesses
A guide to probing and poking.
Fuel Trims
To gain a better perspective on fuel trims, think about how “analog” vehicles dealt with changing fuel and air mixtures.
Getting Rid Of Code P0420 With A Little Cleaning (VIDEO)
A good cleaning might be all you need to get rid of code P0420. This video is sponsored by Rislone.
Cooling System Leak Testing
What replaces the conventional water pump and thermostat is electronic thermostats and electric water pumps.
Diagnosing Electronically Controlled Thermostats
On these systems, there are two ways the engine management module knows there is a problem.
