EFI/ECCS - Cleaner/Tester Machine Operation: Overview

TS82-075
July 26, 1982
Engine Fuel

EFI/ECCS FUEL INJECTOR CLEANER/TESTER
INTRODUCTION
This bulletin gives complete instructions and guidelines covering all phases of operation of the EFI/ECCS Fuel Injector Cleaner/Tester equipment, P/N MST 4743 C/T, including injector cleaning, testing, calibration, maintenance, equipment guarantee, and NMC Warranty Policy.

The Fuel Injector Cleaner/Tester was designed to facilitate fuel injector servicing by cleaning and/or testing fuel injectors without removing them from the engine. Used properly, the equipment is an asset in diagnosing specific fuel injector incidents and saves many hours of troubleshooting.

FUNCTIONS
1. The fuel injector cleaner/tester equipment cleans injectors by supplying a mixture of cleaning solvent and gasoline to the fuel injector loop inlet line on the engine. The engine, isolated from the vehicle's fuel system, is operated at 2000 RPM for a period of 10 minutes, using the solvent/gasoline mixture.

2. In the testing function, the equipment supplies pure gasoline under pressure to the fuel injector loop, dynamically pulsing each injector on-board the engine by means of the equipment's electronic control box. The engine is isolated from the vehicle's fuel system and is not operated during the test cycle. The fuel flow through each individual injector is indicated on the flowmeter scale.
PREPARATION OF NEW EQUIPMENT
1. Remove the fuel tank cap and discard the packing dowel plug in the fuel tank.

2. Check that the manual shut-off valve located at rear of panel is OFF.

3. Fill the fuel tank with clean gasoline to the lower fill line.

4. Direct outlet of supply hose to the fuel tank.

5. Connect the power supply leads to the battery, observing correct polarity: Red - positive; Black -negative, 6. Remove front panel cover. Turn power and timer switches on. Check for leaks. Reinstall the cover.

7. Allow the fuel to recycle for 10 minutes. During the recycling, press the standard and turbo test switches for one minute each.

8. Disconnect the fuel supply hose from the quick-disconnect. Reactivate the 10-minute timer. Tilt the test stand approximately 15~ forward (towards the operator). Using a screwdriver, momentarily press the tip of quick-disconnect fitting three times to complete the system purging procedure.

CAUTION: Air and fuel will be expelled from the fitting. Cover the fitting with a shop rag before purging.

9. Perform calibration of standard and turbo flowmeters per instructions furnished with the equipment. During the flowmeter calibration, ensure that the system is purged of air. The clear plastic supply hose makes it easy to detect air bubbles in the supply line. The calibration injector should be run for a period of no less than three minutes.