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in order so it can run... everyone should have a shop manual for their vehicle, and the library should have a professional shop manual(wiring diagrams and more detailed info) available in the reference section for FREE....make copies of the right sections, and fix it like a PRO!! good luck Dave :)

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17y ago
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16y ago

I never worry about the firing order numbering system that Cadillac uses. I use the more familiar modern Chevy numbering system. Left bank 1-3-5-7 and Right bank 2-4-6-8 Then the firing order is the same as Chevy except cylinders 4 and 7 are switched. 18736542

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16y ago

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Rick

I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://free-auto-repair-advice.blogspot.com

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19y ago

If the dist is at the rear, it is 1-8-4-3-6-5-7-2

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18y ago

4.3 L V6 firing order is 1-6-5-4-3-2 Distributor rotates clockwise.

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16y ago

On your vehicle the firing order is 1-3-4-2

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Q: What is the firing order for a 1991Buick Lesabre?
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