Which risk increases when port fuel injection system solenoid valve exhibits excessive leakage into intake manifold?

💡 Explanation

When the solenoid valve leaks, excess fuel enters cylinder outside scheduled injection timing, leading to pre-ignition because the increased fuel concentration creates hotspots raising combustion temperatures. Therefore engine knock results, rather than converter breakdown, head warping, or oil dilution, which originate from exhaust, cooling or lubrication failures.

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