Underhood Automotive
Ford F-150: Lack Of Heat In Low Temperatures

This condition may be due to deposits from the engine coolant becoming trapped in the heater core.

Servicing Electronically Controlled Thermostats

When the heater circuit fails, most of the time it will create an open circuit.

Proper Procedures To Maximize Fastener Life

The right fasteners, installed the right way, can enhance the quality of any build.

Chasing The Perfect Combustion Event

The perfect internal combustion engine would put the exact amount of fuel and air into the combustion chamber.

Engine Build: Methanol Injected 427 Small Block Ford Engine

Find out what went into this methanol injected, blown 427 small block Ford engine build.

Mazda SkyActiv Service Tips

These engines have been reliable, but there are four pattern failures you might see at your shop.

Engine Build: 1970s LT1 Chevy Street Engine

Jason Ore of 955 Automotive recently rebuilt this ’70s LT1 for a 1965 Corvette Street application.

Engine Build: Twin-Turbo 427 LSX Engine

This Evo VIII owner opted to lose the 4G63 and swap in a custom-built, twin-turbo 427 LSX engine.

Engine Build: Stage 3 Turbo 6.0L Powerstroke Engine

Lead Foot Diesel Performance got to showcase everything it’s capable of on this Ford King Ranch dually build.

Engine Build: 502 cid LS Engine

Find out what went into the build and how much horsepower the engine can crank out!

Diagnosing Crankshaft Position Sensors

Modern engines need to not only know the position of the crankshaft, but the position of the camshafts.

Freeze Frame Diagnostics

Freeze frame data is a “snap shot” of when the code occurs of the specific sensor PIDs.