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Diesel Engine Troubleshooting

 

Complaint ------------->

Probable Cause

Will
Not
Start
Hard
To
Start
Starts
And
Stalls
Dies
On
Deceleration
Runs
Rough
Lack
Of
Power
Black
Smoke
White
Smoke
Low Cranking Speed

X

X

           
Incorrect Starting
Procedure

X

X

           
Some or All Glow Plugs Bad

X

X

   

X

   

X

No Fuel to Cylinders

X

             
Plugged or Restricted
Return

X

X

X

 

X

X

 

X

Insufficient Fuel Supply

X

X

X

 

X

   

X

No Voltage to Shutoff Solenoid

X

             
Shutoff Solenoid Bad

X

X

X

         
Poor Fuel Quality

X

X

X

 

X

X

   
Some or All Injectors Bad

X

X

   

X

 

X

X

Incorrect Pump to
Engine Timing

X

X

     

X

 

X

Low Compression

X

X

         

X

Bad Injection Pump

X

X

X

 

X

   

X

Idle Speed Too Low    

X

X

X

     
Fast Idle Solenoid Bad    

X

         
Air In Fuel    

X

 

X

     
Governor Binding      

X

       
Metering Valve Sticking
In Injection Pump
     

X

       
Fuel Leaks at Injection Lines        

X

     
Air Inlet Restricted          

X

X

 
Transmission Shift Points
Incorrect
         

X

   
Brake Drag          

X

   
Incorrect Engine Timing

X

X

       

X

X

Internal Engine Problems

X

X

     

X

X

 

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