Underhood Archives - Tomorrows Technician
10 Timing Belt Tips

Here are the some key installation and service tips to make your next timing belt job just a little easier.

Not Your Father’s Fuel Pump: Today’s Fuel Pumps Are Different

Understanding fuel pressure and volume is more complicated thanks to fuel injection.

What Kills An Ignition Coil?

All ignition coils transform a low-voltage/high-current power in the primary to high-voltage/low-current energy in the secondary.

Top 10 Changes To Vehicles With Stop/Start Systems

In the shop, it is essential to understand what is different on stop/start vehicles and how it might change your diagnostic approach.

Six Tools For Servicing Serpentine Belts

Servicing the serpentine belt on some vehicles is a tough task. Without the right tools it is almost impossible. Here are six tools to make your next belt replacement more productive.

Fuel Pump Pressure: Optimal Flow Factors

All too often, technicians assume fuel pressure is “good” without actually measuring it. If the engine runs, they assume the injectors are getting adequate fuel pressure. If the engine cranks but won’t start, and they depress the service valve on the fuel rail and some fuel squirts out, then they assume the injectors have pressure.

Air Filter Show & Tell: Seeing Is Believing

Air filters are normal wear items that ­require regular checks and ­replacement. Their role is to trap dirt particles that can cause damage to engine cylinders, walls, pistons and piston rings. In fuel-injected vehicles, the air filter also plays a role in keeping contaminants off the airflow sensor.

New Report Shows Wide Adoption of Stop-Start Technology on Future Vehicles

New data from Navigant Research shows stop-start capability anticipated to be the most important innovation in improving fuel efficiency.

Tech Tip: Mitsubishi TPMS Relearn Procedures

If one or more TPMS sensors have been replaced on most Mitsubishi vehicles, the new ID ­information has to be input directly into the system.

Addressing Extended Oil Changes on Modern Vehicles

Auto manufacturers, in general, are continuing to reduce vehicle maintenance requirements by extending oil change intervals. But extended oil change intervals are a mixed blessing. On the upside, extended oil change intervals are conserving precious oil and reducing carbon emissions. On the downside, many vehicle owners are forgetting to check their engine’s oil level between

Under the Hood: ‘Tanking’ Fuel Systems

Diagnosing Failing Fuel Pumps

Driving Growth: How Clean Cars and Climate Policy Can Create Jobs

This new publication, from the Natural Resources Defense Council, the UAW and the Center for American Progress, demonstrates that a new fleet of fuel-efficient vehicles would allow drivers to enhance energy security, reduce carbon emissions and put auto workers and many others back to work.