Excessive Exhaust Smoke; Exc Essive Fuel Consumption - Toyota 1C Repair Manual

EM -8
ENGINE MECHANICAL - Diesel Engine Diagnosis
EXCESSIVE EXHAUST SMOKE
NOTE:
1. Confirm that the air cleaner I• not clogged.
2. Confirm l(Yith the c ustomer whethe r or not oil consumption has be en excessiv e.
1Possible Cause) (Check Proced~e and Correction Method)
j
1. · IMPROPER INJECTI ON TIMING
1
1-----l
Refer to item 7 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
I
2.
CLOGGED FUEL Fil TER
I
1 3 .
FAUL TY NOZZLE OR NOZZLE
11-- - --l
HOLDER
I
NOTE : Bla ck smok e indicates advance d ti ming
while
white smoke~••• retsded
timing.
Adjustmenu
1hould
be made accordingly.
Refer to item 5 of LACK OF POWER.
NOTE : At h igh ..,aed 12.000 - 3,000 rpm), a
clogged filter tendl
to
make the exhault
smoke white .
Refer to item 9 of ENGINE CRANKS NORMALLY
BUT Will NOT ST ART.
NOTE : Excessive exhaust smoke is ofte n
caused by nozzle pressure being too low .
EXC ESSIVE FUEL CONSUMPTION
NOTE : Confirm whether clutch sli pping . brak es grabbing, tires wrong size or air filter clogged.
(Possible Cause)
(Check Procedure and Correction Method)
1. FUEL LEAKAGE ,__ __ __. Refer
to
item 3 of ROUGH IDLE WITH WAAM
~- -- - ----------' ENG INE.
j
2. IDLE SPEED TOO HIGH
I
3.
MAXIMUM SPEED
TOO HIGH
I,__ _ _ _,
After sufficiently warming up engine, check that
idle speed ls as specified below. (See page EM-23)
Idle speed: 750 - 850 rpm
If not, adjust with idle adjusting screw.
Start engine, depress accelerator pedal to floor
and check that maximum speed is as specified
below. (See page EM-23)
Maximum speed: CV 5, 100 - 5,200 rpm
Others 5,300 - 5,400 rpm
If not. adjust with maximum speed adjus ting screw
4 .
IMPROPER
INJECTIO N TIMING
1-- ---1
Refer to item 7 of ENGINE
CRANKS
NORMALLY
BUT WILL NOT START .
5. FAULTY NOZZLE OR NOZZLE
HOLDER
Refer to item 9 of ENGINE CRANKS NORMALLY
BUT Will NOT ST ART