NTC-8A Checking the Engine Mechanical Systems

TEST NTC-8A CHECKING THE ENGINE MECHANICAL SYSTEMS

NOTE: Perform TEST NTC-1A Before Proceeding

At this point in the diagnostic test procedure, you have determined that all of the engine electrical systems are operating as designed; therefore, they are not the cause of the driveability problem.

The following additional items should be checked as possible mechanical causes of the problem:

1. FUEL INJECTION PUMP - malfunction, or not adjusted properly or incorrect pump timing.

2. AIR IN FUEL SYSTEM

3. RESTRICTED OR DAMAGED INJECTOR NOZZLE

4. IMPROPER FUEL

5. CLOGGED FUEL FILTER

6. RESTRICTED OR BLOCKED FUEL INJECTION LINES

7. LEAKING INJECTION LINES, DAMAGED LINES OR LOOSE CONNECTIONS

8. EMPTY FUEL TANK OR FUEL TANK VENT BLOCKED

9. CLOGGED OR RESTRICTED AIR FILTER

10. INTERCOOLER INTERNALLY BLOCKED OR LEAKING

11. LOW OR UNEVEN ENGINE COMPRESSION

12. LOW IDLE MISADJUSTED

13. CONTROL LEVER NOT GOING TO FULL THROTTLE POSITION