Engine Mechanical problem
1989 Chevy S-10 6 cyl Two Wheel Drive Automatic 131000 miles
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This vehicle is actually a Chevy S10 Blazer 4.3 L engine. I need to know the firing order for the spark plug wires. They were ALL removed at once so now we are playing a guessing game putting it back together. It runs but when idling it's rough and cuts out. Also, the check engine light comes on periodically but goes off. I did not buy top of the line wires should I go back and upgrade these?