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On a 2001 Ford F-150 :
4.2 liter V6 engine
firewall
3 - 6
2 - 5
1 - 4
front of vehicle
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4.6 and 5.4 liter V8 engines
4 - 8
3 - 7
2 - 6
1 - 5
front
Firing order ( 1 - 5 - 3 - 6 - 2 - 4 ) on your 4.9 L / 300 cubic inch straight 6 cylinder The distributor rotor turns CLOCKWISE The marked # 1 position on the distributor cap faces AWAY from the engine The engine cylinders are numbered 1 to 6 , from front to rear