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If a 1991 Chevy Corsica is not running well how do you check to see if it is the coil pack?
Wiki User
∙ 18y ago
The coil packs are attached to the plug wires. Coil packs are interchangable so when I suspect a bad one, I switch the one next to it to see if the problem moves to the other two cylinders. You can also use a inexpensive spark plug tester that clips on to the wire to see how the coil pack is firing thru the plug wire.
Wiki User
∙ 18y ago
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