Underhood Automotive

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Battery Charging and Diagnostics

Here are six tips to use when diagnosing a vehicle with a dead battery. 

Compressor Oil for R1234yf

Working on R-1234yf systems is not that different from the R-134a variety.

Ignition Coil Output

To see inductance inside the primary windings, use an amp probe placed around the positive wire for the ignition coil.

Turbochargers on Minis

No matter if it is a BMW or MINI, when the engine stops turning, the oil flowing to the turbocharger stops.

Fuel Pumps and Cranking

Diagnosing the problem comes down to understanding what causes a loss of fuel pressure.

Plastic Timing Chain Guides

Timing chain guides are designed to wear, but the guides are designed to last the engine’s life.

ECM And PCM Calibration Numbers

Finding out if the vehicle has the latest version or calibration on a module is a required step.

Spark Plug Replacement

Here are some tips to follow when replacing a spark plug.

Solving Intermittent Overheating

New cooling systems anticipate and influence changes in coolant temperature. 

Spark Plug Fouling

Understanding why plugs get dirty.

5 Tricks To Solving Belt Noise

If engineers get it wrong, the belt will be noisy or rob the engine of power. For technicians, the job is even tougher.

Serpentine Belt Grooves
Solving A No-Spark Condition

A no-spark condition could be the result of communication errors or missing data from a dead module.