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2026. 6. 30. 작업

증상

Occasional trouble idling

처리 내용

Why would the car stumble occasionally? Based on what's been described, I'd say it's probably because the air-fuel mixture isn't right. It's either running too rich or too lean. If it is running lean enough, you should be able to hear the engine ping/"cough". Too rich, and the engine will feel like it's getting bogged down. Depressing the clutch or shifting to neutral acts as a near-instantaneous load reduction on the engine, which changes the amount of air flowing into the cylinders. If the fuel management doesn't keep up, it is very easy for the air-fuel ratio to go beyond the engine's intended range of operation. Possible culprits an under-reading MAF sensor positive fuel trims would indicate that this is a plausible root cause. If you're confident that there are no vacuum leaks, MAF's can give lower-than-expected measurements over time due to fouling of the sensor. Cleaning the MAF sensor with electronic cleaner may help restore the sensor's functionality. Bear in mind that a clogg