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Home >> Peugeot >> 1984 >> 604 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Testing >> Injection Nozzles >> Injection Sound Test

Injection Sound Test

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With gauge still disengaged, slowly depress tester lever fully (1-2 strokes per second). A good injector will emit a high pitched squeak. The sound is produced as the needle vibrates on its seat ensuring correct fuel atomization.