156 JTS - FES Mass Air Flow data - Alfa Romeo Forum
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156 JTS - FES Mass Air Flow data

Dear all

Hope you can help me.. Plugged FES into my 156 JTS and it read Mass Air Flow (throttle closed) as either zero or a value that declines over time but does not change with engine RPM.

Which sensor provides the Mass Air Flow data? If my reading is zero or a fixed value that does not change regardless of RPM, what does that mean? Faulty sensor on the car? If so which sensor should I change?

Also Air Quantity data, is that computed by the software or is that measured by a dedicated sensor? If sensor, what sensor is that?

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