GM Cutlass RWD 1970-1987 Repair Guide

FIRING ORDERS

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To avoid confusion, tag and remove the wires one at a time, for replacement

See Figures 1, 2, 3, 4, 5 and 6



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Fig. Fig. 1: 1970-71 Chevrolet-built 250, Inline-6. Engine firing order: 1-4-2-6-3-5. Distributor rotation: Clockwise



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Fig. Fig. 2: 1975 and later Chevrolet-built 250, Inline-6. Engine firing order: 1-4-2-6-3-5. Distributor rotation: Clockwise



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Fig. Fig. 3: Buick built 231, 252 V6. Engine firing order: 1-6-5-4-3-2. Engine rotation: Clockwise



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Fig. Fig. 4: 1970-74 Oldsmobile-built 350, 455 V8. Engine firing order: 1-8-4-3-6-5-7-2. Distributor rotation: Counter-clockwise



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Fig. Fig. 5: 1975 and later;Oldsmobile built engines 260, 307, 403, 455. Firing Order: 1-8-4-3-6-5-7-2. Distributor rotation: Clockwise



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Fig. Fig. 6: Chevrolet-built 305, 350 V8. Firing Order: 1-8-4-3-6-5-7-2. Distributor rotation: Clockwise

 
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