Today’s Fuel Pressure Diagnostics
Direct injection pressure is measured with sensors, and you’ll need a scan tool to measure the signals
Overcharged A/C Systems
Your customers got hot this summer and recharged their A/C system with a DIY refill. Now what? Here’s what to look for.
The October Digital Edition Is Available Today
Each issue includes technical content from Underhood Service and other ShopOwner channels.
Throttle-By-Wire Diagnostics
Throttle-by-wire systems proactively manage the air and fuel going into the combustion chamber.
Acura Turbo Engine Service
It is important to check the operation of the solenoids that control vacuum to the actuators.
Solving Intermittent Overheating
New cooling systems anticipate and influence changes in coolant temperature.
Ignition Systems
The ignition coil is a very simple and robust circuit.
The August Digital Edition Is Available Today
Each issue includes technical content from Underhood Service and other ShopOwner channels.
HV/EV Battery Pack Replacements
It is difficult to say when a battery pack will need to be replaced.
Road Usage Taxes and Right To Repair
The federal gas tax has been around since 1932, and some state fuel taxes even longer.
Diagnosing Crankshaft Position Sensors
Modern engines need to know the position of the crankshaft and camshafts.
Spark Plug Evolution
Spark plugs have changed over the years.
