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Home >> GMC >> 1986 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - 6.2L Diesel >> Testing >> Injectors >> Spray Pattern Test
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Spray Pattern Test

The injectors used with this system have several features which make pattern testing difficult. These features include longer nozzle overlap, greater pintle to body and needle to body clearances, and an internal wave washer between injector nut and injector. Typical injector testers cannot deliver fuel with sufficient velocity to obtain proper spray patterns. DO NOT  replace injector(s) because of spray pattern.