8. Digifant I Fuel Injection (California)
The Digifant I engine management system is a further development of the Digifant II engine management system. Digifant I is installed on California 8-valve models (engine code RV) beginning in 1991.
The basic design and operation of Digifant I is the same as Digifant II, where the engine's ignition and fuel injection functions are combined into one system to be managed by a single electronic control unit. Digifant I and Digifant II share many of the same components and functions. The following are the significant differences of Digifant I:
This heading covers only those Digifant I components and functions that are different from Digifant II. For a more thorough description of the design and operation of the Digifant engine management system, see 7. Digifant II Fuel Injection. For a discussion of the ignition functions of Digifant I, see IGNITION.
Although dealership technicians use special equipment to service the Digifant I system, it has been designed so that almost all electrical components can be tested using only a low-current LED test light and a multimeter. Most of these tests can be performed right at the Digifant I control unit harness connector. The only other major piece of test equipment required is a fuel pressure gauge. Incorrect system fuel pressure can directly affect engine performance.
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