Here are some time-saving tricks and handy test tips for this popular fuel-injection system.

Some people cell it CIS, continuous injection system. Others call it K-Jetronic. The K comes from konstant – German for constant. But when things go wrong, you call it things we can’t print! Always apply the same preliminaries to K-Jetronic that you apply to L-Jet: a basic engine/ignition analysis and fuel system pressure tests. And fuel pump pressure/volume tests are extremely important during K-Jet analysis.

Anytime you have a fuel delivery problem, check for a bad fuel pump or fuel pump pickup. With practice, you’ll learn how a bad pump sounds.

Because the K-Jet injectors are hydraulically operated, they need a steady diet of clean, bubble-free fuel or they won’t open. Therefore, fuel pressure and fuel quality are critical on all K-Jet and K-Jet derivative systems.