Why does the Changan Karvaan engine misfire more during rainy o r humid weather? Is it related to spark plugs?

Home > Gari Forums > Changan Forums > Changan Karvaan Forums > Changan Karvaan Spark Plug Problems Forums

Why does the Changan Karvaan engine misfire more during rainy o r humid weather? Is it related to spark plugs?

Several users report increased misfiring o r rough idling in damp weather. Could moisture be causing issues in the spark plug system, o r is the coil boot insulation weak?

Qalb E Momin asked on 06 Aug 2025 13:01:01 pm

1 Answer

19 views |

Car Mechanic Expert - on 06 Aug 2025 13:05:10 pm

Yes, it’s related to:

Moisture entering the ignition coil boot

Poor insulation o r cracked plug wires

Humidity interfering with spark strength

In Pakistans monsoon season, Karvaan users report rough idling, stalling, and delayed ignition. Waterproofing the coil area and ensuring clean plug boots can reduce this issue.