EM-8
ENGINE MECHANICAL Troubleshooting (Diesel Engine Diagnosis)
ROUGH IDLE WITH WARM ENGINE
(Possible Cause)
(Check Procedure and Correction Method)
1. IMPROPER ADJUSTMENT OF
ACCELERATOR CABLE
With accelerator pedal released, check that adjusting
lever is in contact with idle speed adjusting screw.
Also check if accelerator cable or linkage is catching
on something.
If necessary, adjust so that lever is in contact with
screw, or make other required repairs.
2. IDLE SPEED TOO LOW
Check idle speed. (See page EM-27)
Idle speed:
1PZ 600-700 rpm
1 H Z M / T 600-700 rpm
1HZA/T 660-760 rpm
1HD-T M/T 600-700 rpm
1H D -T A/T 750 - 850 rpm
HINT: If less than standard, idling would normally
be rough.
If not as above, adjust with idle speed adjusting
screw.
Check for leaks at injection pump connections,
pump distributive head bolts, injection nozzles and
delivery valve holders.
Tighten any loose connections to specified torque or
replace parts as necessary.
Refer to step 7 of ENGINE CRANKS NORMALLY
BUT WILL NOT START, above.
4. IMPROPER INJECTION TIMING
3. FUEL LEAKAGE
Summary of Contents for 1HD-T
Page 1: ......
Page 53: ...EM 42 ENGINE MECHANICAL Timing Gears TIMING GEARS COMPONENTS ...
Page 65: ...EM 54 ENGINE MECHANICAL Cylinder Head CYLINDER HEAD COMPONENTS ...
Page 95: ...EM 84 ENGINE MECHANICAL Cylinder Block CYLINDER BLOCK COMPONENTS ...
Page 133: ...TURBOCHARGER SYSTEM Turbocharger TC 9 COMPONENTS ...
Page 145: ...FU 6 FUEL SYSTEM Fuel Heater System FUEL HEATER SYSTEM SYSTEM CIRCUIT ...
Page 166: ...FUEL SYSTEM Injection Pump FU 27 INJECTION PUMP REMOVAL OF INJECTION PUMP ...
Page 169: ...FU 30 FUEL SYSTEM Injection Pump COMPONENTS ...
Page 170: ...FUEL SYSTEM Injection Pump FU 31 COMPONENTS Cont d ...
Page 171: ...FU 32 FUEL SYSTEM Injection Pump COMPONENTS Cont d ...
Page 251: ...LU 4 LUBRICATION SYSTEM Troubleshooting TROUBLESHOOTING ...
Page 255: ...LU 8 LUBRICATION SYSTEM Oil Pump OIL PUMP COMPONENT ...
Page 272: ...ST 4 STARTING SYSTEM Pre Heating System Super Glow Type TIMER CHARACTERISTIC DIAGRAM Cont d ...
Page 282: ...ST 14 STARTING SYSTEM Starting System Circuit STARTING SYSTEM CIRCUIT Cont d ...
Page 340: ...B 1 STANDARD BOLT TORQUE SPECIFICATIONS Page STANDARD BOLT TORQUE SPECIFICATIONS B 2 ...
Page 343: ...C 1 SSTAND SSM Page SST SPECIAL SERVICE TOOLS C 2 SSM SPECIAL SERVICE MATERIALS C 6 ...