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1-3-5
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2-4-6
1-4-6-3-5-2 Often the trio of dual coil packs are numbered accordingly. These coil packs can often be found mounted to the engine block under the forward cylinder bank exhaust manifold.
Firing order: Industrial GM 3.0 inline 4: 1
1993 buick 3.8 firing order
the firing order on a GM HEI is 1-8-4-3-6-5-7-2
Start with number 1 cylinder in the same place as a standard rotation motor, then use the same firing order as the standard, but in a counterclockwise pattern. Just did this on mine and it works !!
That is the firing order for the GM small block & big block V8. That would include the 267, 305, 327, 350, 400 small block, & 396 through 454 big block.
The firing order should be 1-3-4-2.
firing order is 1, 3, 4, 2
123456
FIRING ORDER IS 1-8-4-3-6-5-7-2
CTS V6-3.2L VIN N (2003), firing order 1,2,3,4,5,6.
123456 is the firing order from the GM HAYNES REPAIR MANUEL
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