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Firing Order for the 3.1 ltr
Well here's one that's got me stumped. My son's 1991 RS has a rebuilt engine in it and instead of the 1-2-3-4-5-6 firing order that's supposed to be right it has 1-4-3-6-2-5. I believe this is the Lumina Euro Coupe engine from Mex. Anybody know for sure?
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