Excessive fuel consumption
| Cause | Correction | |
| Additional loading from malfunctioning accessories |
 |
Check/repair accessories and vehicle components. |
 |
||
| Operator technique |
|
Review operation for correct gear shifts, deceleration and idling. |
|
||
| Poor quality fuel |
|
Make sure quality no. 2 fuel is being used. |
|
||
| Inadequate intake air or exhaust restriction |
|
Refer to Troubleshooting Logic for excessive exhaust smoke. |
|
||
| Fuel pump timing |
|
Check/time the pump. |
|
||
| Worn or malfunctioning injectors |
|
Check/replace injectors. |
|
||
| Valves not seating |
|
Check/adjust valves. |
|
||
| Malfunctioning power functions |
|
Check/repair power functions. |