Magazine Archives - Page 13 of 70 - UnderhoodService
Top 10 Things You Need To Know About GM Stop/Start Systems

It is essential to understand what is different on these vehicles and how it might change your diagnostic approach.

Diagnosing Electronically Controlled Thermostats

On these systems, there are two ways the engine management module knows there is a problem.

Fuel Pumps And Voltage Drop – Still A Valid Test

Voltage drop testing compares the battery or charging voltage to the voltage at the component.

GM Transmission Tech Tip: Low Line Pressure

After installing service pump cover, a transmission may have low line pressure.

Subaru EJ25 Head Gasket Headaches

Properly replacing Subaru EJ25 head gaskets takes patience and quality parts.

Be Your Own Lift Cable Guy

We explore how to maintain your lift cables or “wire ropes,” how to look for damage and when to replace a cable.

Ford Adaptive Cruise Control Alignment Process

Follow these steps for proper horizontal alignment of the cruise control module radar sensor.

Performance Spark Advance: Controlling Ignition Timing Delays

Ignition delay occurs during the time that it takes to fully ignite the mixture with a spark plug.

Auxiliary Water Pump Diagnostics

The auxiliary water pump is designed to circulate warm coolant to the heater core.

Ultimate Underhood: The Epic Story Of The Buick Turbo V6

By 1986, the introduction of an intercooler and lightweight turbocharger gave the car an underrated 245 hp.

Do You Know The Three Types Of TPMS Relearns?

There is an increasing number of vehicles that require a scan tool to complete a TPMS repair.

Prepare For R1234yf Now

Currently, there are approximately 35 million vehicles on the road with R1234yf in the HVAC system.