1-6-5-4-3-2
Which engine?
The firing order is 1-6-5-4-3-2.
1-8-4-3-6-5-7-2
A diagram for a 2001 Chevy impala 3.4L engine & coil pack firing order
Clockwise
The firing order is 1342 where the no. 1 plug is on the front of the engine.
1-3-4-2
1, 2,3,4,5,6
Clockwise starting with the 18436572
3.8L engine, 1,4,2,5,3,6.
4.2L ?
165432