Hombre XS Space Cab 2WD V6-4.3L (1998)
Distributor: Description and Operation
Distributor
DESCRIPTION
The distributor is actually an assembly that contains the Camshaft Position (CMP) sensor, cap, rotor and shaft. The distributor is splined by a
helical gear to the camshaft and provides spark to each spark plug wire. when servicing the distributor, it is critical to ensure proper cap sealing to
the distributor body and correct installation to the camshaft. If the distributor is installed a tooth off in relation to the camshaft, a Diagnostic
Trouble Code (DTC) will set. The distributor is not repairable and must be replaced as an assembly.
OPERATION
NOTE: The distributor used with the OBD II ignition system is located in a fixed, non-adjustable position. Do not adjust the engine base timing by
rotating this distributor. Otherwise, crossfiring and damage to the distributor will result.
The 4.3L engines ignition system consist of a distributor with the following components:
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A Hall Effect Switch
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A Camshaft Position (CMP) sensor
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A separate ignition coil with sealed connectors
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The secondary wires
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The spark plugs
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A Knock Sensor (KS)
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A Crankshaft Position (CKP) sensor
The ignition system is controlled by the Vehicle Control Module (VCM). The VCM monitors information from various engine sensors. The VCM
computes the desired spark advance timing, and controls the dwell. The VCM also controls the firing of the ignition coil via an ignition control line to
the coil driver.
