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On a 2002 Toyota 4-Runner 3.4L V6, the spark plug gap is .044", but there's a caveat. The OE factory recommended plugs (DENSO or NGK) are designed with dual-ground electrodes, which are pre-gapped at .044" and therefore a gap adjustment is not required. For this particular application, the dual-ground electrode style spark plug is the preferred plug and I recommend them for optimum engine performance (quicker starts, smoother acceleration, and overall better combustion and fuel efficiency).

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Q: What is the spark plug gap for a 2002 Toyota 4-runner 3.4 liter v-6?
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