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2026. 6. 30. 작업
2001 Infiniti QX4 rough idle - leaking fuel damper vacuum port
Thanks for the great detail. Considering this is a bit of an odd issue, I'll try thinking outside the box a little. But first I would use a multimeter to test the coolant temp sensor, then o2 sensors. Perhaps even a quick check of the upper radiator hose to make sure the thermostat isn't stuck open. I say to check these first because it sounds like you're running a little rich even after warm-up. If these all check out, then on to my real suspicions: A possible problem with the camshaft or a malfunctioning crankshaft position sensor, which the latter can be tested with a meter if you haven't gotten a check engine light for codes. The ECU uses this sensor (among others) to adjust timing and, since that could be directly affecting the sequential injection, it could be causing that fuel smell right at the damper, as well as the performance issues you describe. Extremely small leak could just be evaporating or the damper could be stressed from working harder due to fluctuations in the inje
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