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GMC S15 Problems

Oil-soaked spark plug wire rubber boots can cause misfire or rough idle on GMC S15

Problem Description and Possible Solution

The spark plug wire rubber boots may get soaked with oil, causing a misfire or rough idle.

(1 person reported this problem)

GMC S15 Vehicles With This Problem

RepairPal Verified
Average mileage: (–)
Engine affected: 2.5L 4 Cylinder
1 model year affected: 1990
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