Toyota 1PZ Repair Manual page 19

EM-8 ENGINE MECHANICAL
(Possible Cause)
1. IMPROPER ADJUSTMENT OF
ACCELERATOR CABLE
2. IDLE SPEED TOO LOW
3. FUEL LEAKAGE
4. IMPROPER INJECTION TIMING
Troubleshooting (Diesel Engine Diagnosis)
ROUGH IDLE WITH WARM ENGINE
(Check Procedure and Correction Method)
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.
Check idle speed. (See page EM-27)
Idle speed:
1PZ 600-700 rpm
1HZM/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.