Injection twice/combustion

WARNING: This page is about a different car, the 2003 Saab 9-3 and 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Cycle Diagram Of Injection Twice/Combustion

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Injection takes place semi-sequentially at 180 intervals until the camshaft position has been detected. This means two cylinders at a time in the following order:

Cylinders 1 and 4.
Cylinders 2 and 3.

Each injector injects fuel once per crankshaft revolution and that means that the basic time must be divided by two.