MEFI Fuel Injection
Special Service Tools
This is a normal reading from an 8.1Gi during a hard acceleration. The wave in the RPM graph was due to the prop ventilating slightly during the test. The center graph is the manifold air temperature declining as fresh air is pulled into the engine. The spark gets retarded slightly as the manifold pressure changes and RPM increases to prevent knock or detonation damage. The spark advance is related to RPM and MAP. Ideally, make multiple recordings: COLD: One minute cold start up. Start recording first, then crank to start, let idle for another 45 seconds. WARM: Warm engine, turn it off, key on and begin recording, start engine and do three accelerations with 1)minimum throttle to maximum throttle as slow as reasonably done, 2)repeat with a medium-fast rate of throttle opening to maximum, and 3)once more with rapid WOT, then back to idle and now stop recording. All three in one file. Name the file as: engine model _ serial number _ altitude _ and either word cold or hot, followed by .rec. Example: 50gxi_4012053616_7000ft_cold.rec
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