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Home >> Chevrolet >> 1985 >> Astro Van M L4-151 2.5L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Modes of Operation >> Clear Flood Mode (Port and TBI Injection)
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Clear Flood Mode (Port and TBI Injection)


A flooded engine is cleared by fully depressing the accelerator pedal, which causes the ECM to pulse the injectors at a air/fuel ratio of 20:1. The ECM will maintain this air/fuel ratio as long as the throttle is wide open and engine RPM is less than 600. If throttle position becomes less than 80% of wide open throttle, the ECM returns to "Starting Mode".