All V8 Chevrolet's are 1,8,4,3,6,5,7,2 with 1,3,5,7 on the left bank and 2,4,6,8 on the right with the distributor rotating clockwise.
1-8-4-3-6-5-7-2
if it is a V8 it is 18436572
18436572
165432
For a 1991 Chevy S10 2.5L engine the firing order is: 1-3-4-2 . The distributor rotates clockwise.
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165432 #1 cylinder is left front
The firing order should be 1-8-4-3-6-5-7-2.
When troubleshooting problems within an engine, it can help to know the firing order. The firing order of a 1991 Chevy Lumina 3.1L is 1-2-3-4-5-6.
Chevy 5.7 L firing order is 1-8-4-3-6-5-7-2 clockwise.
it will be stamped on your intake. all 8 numbers in a random order.
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