The rotor not spinning when cranking engine over is where to start. This engine has no timing chain, it is gear to gear, so least likely to be the issue. Most likely would be the distributor gear or camshaft gear that spins the gear on the distributor shaft.
Mark everything and then Remove the distributor for inspection.
1.Align timing pointer with top dead center (TDC) on crankshaft vibration damper.
2.Mark position of No. 1 cylinder wire tower on distributor base. Mark will provide an alignment reference when reinstalling the distributor (12127).
3.On a 4.9L engine, loosen distributor cap hold-down screws. On all V-8 engines, disengage distributor cap hold-down clips.
4.Lift distributor cap (12106) with attached wire set straight off distributor to prevent damage to rotor blade and spring. On V-8 engines, remove attaching screws and base adapter.
5.Position distributor cap and attached wire set aside so as not to interfere with removal.
6.Check if distributor rotor blade is pointing toward the marked position on the distributor base adapter (12A217). If distributor rotor blade is pointing one-half a revolution off, rotate crankshaft one full revolution and realign timing pointer with TDC on crankshaft vibration damper.
7.Disconnect wiring harness at distributor.
8.Remove distributor rotor (12200) by pulling upward on distributor rotor from distributor shaft.
9.Remove distributor hold-down bolt and clamp.
10.Remove distributor from cylinder block by pulling upward with a slight side-to-side twist.
11.Cover distributor opening in cylinder block with a clean shop towel to prevent the entry of foreign material into engine.
If the distributor gear checks out, inspect the camshaft gear before moving on to the timing gears.
The rotor not spinning when cranking engine over is where to start. This engine has no timing chain, it is gear to gear, so least likely to be the issue. Most likely would be the distributor gear or camshaft gear that spins the gear on the distributor shaft.
Mark everything and then Remove the distributor for inspection.
1.Align timing pointer with top dead center (TDC) on crankshaft vibration damper.
2.Mark position of No. 1 cylinder wire tower on distributor base. Mark will provide an alignment reference when reinstalling the distributor (12127).
3.On a 4.9L engine, loosen distributor cap hold-down screws. On all V-8 engines, disengage distributor cap hold-down clips.
4.Lift distributor cap (12106) with attached wire set straight off distributor to prevent damage to rotor blade and spring. On V-8 engines, remove attaching screws and base adapter.
5.Position distributor cap and attached wire set aside so as not to interfere with removal.
6.Check if distributor rotor blade is pointing toward the marked position on the distributor base adapter (12A217). If distributor rotor blade is pointing one-half a revolution off, rotate crankshaft one full revolution and realign timing pointer with TDC on crankshaft vibration damper.
7.Disconnect wiring harness at distributor.
8.Remove distributor rotor (12200) by pulling upward on distributor rotor from distributor shaft.
9.Remove distributor hold-down bolt and clamp.
10.Remove distributor from cylinder block by pulling upward with a slight side-to-side twist.
11.Cover distributor opening in cylinder block with a clean shop towel to prevent the entry of foreign material into engine.
If the distributor gear checks out, inspect the camshaft gear before moving on to the timing gears.
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