Motive Power Industry BLUR 150, Service Manual

Page: 41 / 234

(12) Acceleration slow
General trouble location: 1. Water in fuel; 2. Inlet pressure sensor and air throttle sensor; 3. Spark plug; 4.
Air throttle and idle air bypass; 5. Air intake; 6. ISC ; 7. Nozzle; 8. Ignition timing; 9. Exhauster.
Procedure for general diagnoses:
No. Operating Procedure
Detection
Results
Subsequent
Steps
Yes
Check the air
intake system.
1 Check the air filter for any jam.
No Next step
Yes Next step
2
Connect a fuel pressure gauge before the fuel inlet of the
nozzle; start the engine to check the fuel pressure at 300kPa
or so during the idle status.
No
Repair the fuel
supply system.
Yes Next step
3
Check the spark plug in the cylinder and its model and gap
conformable to specifications.
No
Adjustment or
replacement
Yes
Clean relevant
parts.
4
Remove the ISC and check the air throttle, the ISCand the
idle air bypass for any carbon deposition.
No Next step
Yes Next step
5
Check the inlet pressure sensor, the air throttle sensor and
circuits.
No
Correct circuits or
replace any
sensor.
Yes
Replace the
defective nozzle.
6
Disassemble the nozzle and check any leakage or jam in the
nozzle with a nozzle cleaner & analyzer.
No Next step
Yes Change fuel.
7
Check fuel and observe any trouble attributed to fuel just
added.
No Next step
Yes Next step
8
Check if the engine’s ignition timing is conformable to
specifications.
No
Correct ignition
timing.
Yes Next step
9 Check the exhauster for exhaust normally discharged.
No
Repair or replace
the exhauster.
Yes Diagnosis assist
10
Connect an EMS adapter and press the power switch to
check voltages at Pins
1#, 19#, and 29#
; check grounding
at Pins
8#
﹐
35
#
and
36#.
No
Repair the
relevant circuits.
37