Toyota 1PZ Repair Manual page 22

ENGINE MECHANICAL
3. INTERCHANGED OVERFLOW
SCREW (OUT) AND INLET (NO
MARK) FITTING
4. FUEL LEAKAGE
5. CLOGGED FUEL FILTER
6. IMPROPER INJECTION TIMING
7. FAULTY INJECTION NOZZLES
HINT:
• Check that the air cleaner is not clogged.
• Check with the customer whether or not oil consumption has been excessive.
(Possible Cause)
1. IMPROPER INJECTION TIMING 1. IMPROPER INJECTION TIMING~|
2. CLOGGED FUEL FILTER 2. CLOGGED FUEL FILTER
3. FAULTY INJECTION NOZZLES
3. FAULTY INJECTION NOZZLES
Troubleshooting (Diesel Engine Diagnosis)
HINT: Overflow screw is marked "OUT" and has
an inner jet. Although both fittings are same size,
they must not be interchanged.
Refer to step 3 of ROUGH IDLE WITH WARM EN-
GINE.
Disconnect inlet hose to fuel filter, and feed clean
fuel directly into pump.
HINT: When feeding fuel directly into pump, keep
container at same level as vehicle fuel tank.
If engine condition improves, fuel filter is clogged
and should be replaced. (See page FU-4)
If no increase in engine condition after replacing
fuel filter, check priming pump (hand pump) or per-
form other necessary repairs.
Refer to step 7 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
Refer to step 9 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
EXCESSIVE EXHAUST SMOKE
1 Refer to step 7 of ENGINE CRANKS NORMALLY Refer to step 7 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
B ( j T W | L L N Q T S T A R T
HINT: Black smoke indicates advanced timing HINT: Black smoke indicates advanced timing
while white smoke indicates retarded timing. Adjust- while white smoke indicates retarded timing. Adjust-
ments should be made accordingly. ments should be made accordingly.
| 1 Refer to step 5 of LACK OF POWER. Refer to step 5 of LACK OF POWER.
HINT: At high speed (2,000-3,000 rpm), a HINT: At high speed (2,000-3,000 rpm), a
clogged filter tends to make exhaust smoke white. clogged filter tends to make exhaust smoke white.
| 1 Refer to step 9 of ENGINE CRANKS NORMALLY Refer to step 9 of ENGINE CRANKS NORMALLY
BUT WILL NOT START. BUT WILL NOT START.
HINT: Excessive exhaust smoke is often caused by HINT: Excessive exhaust smoke is often caused by
nozzle pressure being too low. nozzle pressure being too low.
(Check Procedure and Correction Method)
EM-11