Which risk increases when an engine's multi-point fuel injector experiences insufficient rail pressure?

💡 Explanation

When rail pressure is insufficient, the multi-point fuel injector delivers less fuel than required, forming a lean fuel mixture which increases the likelihood that the mixture spontaneously ignites before spark because of the elevated temps. Therefore, pre-ignition increases significantly, rather than converter damage, bearing scoring, or valve float, each of which requires different initiating conditions.

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