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Which risk increases significantly with excessive injector dwell time in modern gasoline direct injection (GDI) engines?

A)Fuel film formation on piston
B)Incorrect valve timing occurrence
C)Catalytic converter overcooling
D)Crankshaft bearing lubrication failure

💡 Explanation

Fuel film formation risk increases due to injector over-energizing causing incomplete atomization which then floods areas rather than combusting completely because the excessive dwell allows fuel droplets to coalesce; therefore a fuel film is the outcome, rather than complete combustion.

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