EM-6
ENGINE MECHANICAL - Diesel Engine Diagnosis
4. IMPROPER INJECTION
TIMING
5. IMPROPER OPERATION OF
NOZZLE OR DELIVERY VALVE
Refer to item 7 of ENGINE CRANKS NORMALLY
BUT Will NOT START, above.
With engine idling, loosen the injection pipe to .
each cylinder in order. and check if the idle speed
changes .
If no change, a faulty cylind er is indicated.
Check according to following procedure .
• Faulty Nozzle or Nozzle Holder
Check nozzle with nozzle tester . (See page FU- 6)
Opening presure: 135 - 155 kg/cm' -
11,92 0 - 2 ,2 05 psi)
(13,239 - 15,200 kPal
If pressure is not within specification . l'\OZZle
is faulty and -injection -pressure shou ld be
readjusted . (See page FU-8)
• Faulty Delivery Valve
If injection pressure is within specification , delivery
valve is defectiv e and should be replaced.
ENGINE SUDDENLY STOPS
(Poaible Cause)
1. ENGINE WILL NOT RE-START
2. ROUGH IDLE
3. MALFUNCTION OF FUEL-CUT
SOLENOID
4 . NO FUEL INTO INJECTION
PUMP
(Check Procedure and Correction M ethod)
Check to see if engine re-starts according to
prescribed procedure.
If not refer to ENGINE CRANKS NORMALLY BUT
WIL L NOT START. above, and repair as necessary.
If idle is not stable, refer to ROUGH IDLE WITH
WARM ENGINE and repair accordingly .
Refer to ENGINE CRANKS NORMALLY BUT Will
NOT START. above. and chec k accord ingly.
NOTE : No operation noise from the fuel cut
solenoid may be due to loose electrical
connect ions, so check connectors before
Pf'OCHdlng with further repair s.
Ref!lf . to item 3 of ENGINE CRANKS NORMALLY
BUT WILL NOT START, above.
ENGINE MECHANICAL - Diesel Engine Diagnosis
EM-7
LACK OF POWER
NOTE:
1. First confirm that the air c leaner Is no t clogge d or t he engine ove rheating . . .
2. Not eppllceble If the cuetomer desires an output p0wer higher than specifi ed for tha t vehicle .
For eocureoy, edJuet with • chassis dynamo.
........c.u.,
IMPIIOPIII ACCILERATOR
GAIi.i ADJUITMENT
(Check Procedure end Correction Method)
11--- --i With accelerator fully depressed, check that
I adjusting lever Is in contact with maximum speed set
screw . (See page EM-23)
If not adjust accordingly .
I
:a. INSUFFICIENT I Start engine. depre ss accelerator pedal to floor end
MAXIMUM SPEED ,1-- -----i check that maximun speed is as specifi ed below .
'---""""'"""';;.;.;.;.=.c.:_.c..---- - --~ (See page EM- 23)
, INTIRCHANGED OVERFLOW
ICM W (OUT) AND INLET (NO
MAIIKI FITTING
M aximum speed : CV 5,100 - 5,200 rpm
Others 5 ,300 - 5,400 rpm
If not. adjust with maximum speed adjusting screw .
NOTE : Overflow screw Is marked " OUT" end
t----l has an Inner jet. Although both fitting s ere same
size. they must not be Interchanged.
1-- -- --l Refer to item 3 of ROUGH IDLE WITH WARM
PUIL LIAKAGE
'-------- --- -__J ENGINE.
I I , CLOGGED FUEL FILTER '
1
1-----< Disconnect inlet hose to fuel filter and feed clean
'----------- -- ---'
1
fuel directly into the pump .
If engine cond ition improves , fuel filter 'is clogged
and should be replaced. (See page FU-2)
NOTE : When fee ding fuel direct ly Into pump,
keep container at same leve l ea vehicle fuel
tank.
If no increase in engine conditi on after replacing
fuel fitter, check priming pump or perform other
necessary repairs.
I. INJICfflON TIMING 1---- -i Refer to item 7 of ENGINE CRANKS NORMALLY
7. PAUL TY NOZZLI OIi NOzal
HOLDER
BUT Will NOT ST ART.
1------l Refer to item 9 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
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