Faulty Fuel Injection
To determine if a faulty fuel injection is causing excessive white smoke, perform the following:
- Check for faulty fuel injection; perform “Flow Test at Fuel Injector”. Refer to "3.5 Test #3 Flow Test — At Fuel Filter" .
- Repair or replace the faulty fuel injection; refer to MBE 4000 Service Manual (6SE420), Chapter 2, Fuel System — Fuel Injector”.
- Verify fuel injection repair or replacement; refer to "11.9.1 Test the Engine with Repaired Fuel Injection" .
Test the Engine with Repaired Fuel Injection
To determine if a faulty fuel injector is causing excessive white smoke, perform the following:
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.
- Start and run the engine.
- Run the engine at idle with a no-load condition for approximately five minutes, allowing the engine coolant to reach normal operating range, approximately 88-96°C (190-205°F).
- Visually inspect exhaust for excessive white smoke.
- If the engine exhaust emission appears normal, no further troubleshooting is required. Shut down the engine.
- If the engine exhaust emission is excessively white, shut down the engine. Check for improper valve clearance or damaged camshaft lobes and rollers; refer to "11.10 Improper Valve Clearance, Worn or Damaged Camshaft Lobes and Rollers" .
|EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568|
|Generated on 10-13-2008|