An engine is being diagnosed for a lean running condition. Technician A checks for air leaks in the intake. Technician B checks for alcohol in the fuel. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct in their approach to diagnosing a lean running condition. Technician A is checking for air leaks in the intake system, which can cause additional air to enter the combustion chamber, leading to a lean mixture. Technician B is checking for alcohol in the fuel because higher concentrations of alcohol can lean out the fuel mixture, as alcohol requires more air for complete combustion compared to gasoline.

An Engine Is Being Diagnosed for a Lean Running Condition