PleasureCraft Engine Group 5.0L, Diagnostic Manual

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4B - 4 Electronic Ignition 6.0/8.1L
MEFI 4 - PCM
Ignition Coils
260177
The ignition system on this engine features a multiple coil
confi guration and is known as coil near plug. There are
two styles of ignition coil assemblies (1) and (2) for the
8.1L engine. The engine could have either style. The
two styles are not interchangeable. The following table
illustrates the type of coil used:
Camshaft Position (CMP) Sensor and Reluctor
Wheel
The camshaft position (CMP) sensor works in conjunction
with a 1X reluctor wheel mounted at the rear of the
camshaft. The CMP is used to determine the top dead
center position of cylinder #1, and will synchronize with
the 24X CKP sensor signal for quicker starting. The CMP
signals are output as a digital waveform.
690593
1
2
Engine OLD Coil (1) NEW Coil (2)
Prior to 425408
8.1L H.O. S/N 425408 to present
6.0L N/A ALL
Early 8.1L Only
(See Table Below)
6.0/8.1L
(See Table Below)