Brad's Car Manuals: A 3rd party mirror of CHARM + LEMON car manuals
Home >> GMC >> 1988 >> Forward Control 5.7 M, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Testing >> Injectors >> Spray Pattern Test

Spray Pattern Test

Download the full database via torrent (~1.1 TB)

The injectors used with this system have several features which make pattern testing difficult. These features include longer nozzle overlap, greater pintle 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.