customer relations Archives - UnderhoodService
Why Do Timing Chains Stretch?

As the timing chain wears, it can change the timing of the camshaft and crankshaft.

ADAS Calibration Tips

Here are 10 tips to follow during ADAS Calibration.

Diagnostic Procedures For Stop/Start Systems

Stop/start technology is more than just a switch wired to the brake pedal and starter.

Diagnosing Misfires

What if there are no codes and a misfire is intermittent? This is where it gets complicated.

Compressor Oil for R1234yf

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

ECM Damage

Engineers have devised two strategies that can be called the “immune system” for the electrical system.

Ignition Coil Output

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

Fuel Pumps and Cranking

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

AC Condensers

The characteristics that make the parallel-flow condenser so efficient are among its major drawbacks as well.

OBDII Connectors

OBDII connectors serve as the main communication point between the technician and the vehicle.

Where Were You 22 Years Ago?

A lot can change in 22 years.

Spark Plug Fouling

Understanding why spark plugs get dirty.