What Causes Honda's Smart Fuel Injection System Failure?

1 Answers
SanGenesis
07/30/25 10:41am
Honda's smart fuel injection system failure is likely due to a malfunction in the engine's fuel trim. The cause of this issue could be a faulty fuel injector. Additional information is as follows: 1. Symptoms of the failure: Fuel trim refers to the electronic control unit (ECU) adjusting the opening time of the fuel injectors to control fuel delivery, ensuring the engine achieves the optimal air-fuel ratio (14.7:1 air to gasoline mass ratio). A ratio that is too rich indicates excessive fuel delivery, while a ratio that is too lean indicates insufficient fuel delivery. 2. Causes of the failure: These include air leaks downstream of the mass air flow (MAF) sensor, leaks in the PCV system, exhaust leaks near or before the oxygen sensor, clogged fuel injectors or other fuel system issues, leaks in the EGR system, and contamination of the MAF sensor (causing the electronic control module to underestimate air flow).
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