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Take a look at service bulletins, click on the link. This is for 5.7L engine vin P. Is this opti-spark ignition?
This distributor has optical sensors, inside.
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Distributor
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Ignition coil driver module
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Ignition coil
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Crankshaft position (CKP) sensor
Now which part do you want to replace ?
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Cap and rotor
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Camshaft position sensor
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Gear drive and shaft
The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position (CMP) sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the camshaft position sensor will not affect driveability. The sole purpose of the camshaft position sensor is to provide the VCM with the necessary information for the misfire diagnostic trouble codes (DTCs).
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