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Hi!!
Here are the two engine configurations WITH AND WITHOUT HEI SYSTEM, they both have the firing order 1-8-4-3-6-5-7-2 and the distributor ROTATES CLOCKWISE.
NO HEI SYSTEM
HEI SYSTEM
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For the 2001 Chevrolet Impala I do not know if you have the 3.4L or 3.8L however I have included both below: For the 3.4L V6: Firing Order: 1-2-3-4-5-6 Ignition Connections: ............(back)........... .'.5..2.'..'.3..6.'..'.4..1.' ............(front)
For the 3.8L V6: Firing Order: 1-6-5-4-3-2 Cylinders: .....(back)..... '...2...4...6...' ___________ '...1...3...5...' .....(front)
Ignition Coil Connections: (back) o 6 o ---3 o 2 o ---5 o 4 o ---1 (front)
Firing OrdersNOTE: To avoid confusion, remove and tag the spark plug wires one at a time, for replacement.
3.1L (VIN M) engine
Firing order: 1-2-3-4-5-6
Distributorless Ignition System
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