Acceleration Slow - PGO Tigra AF-125BAE Service Manual

(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. Idle governor; 7. Nozzle; 8. Ignition timing; 9. Exhauster.
Procedure for general diagnoses:
No.
1 Check the air filter for any jam.
Connect a fuel pressure gauge before the fuel inlet of the
2 nozzle; start the engine to check the fuel pressure at 300kPa
or so during the idle status.
Check the spark plug in the cylinder and its model and gap
3
conformable to specifications.
Remove the idle governor to check the air throttle, the idle
4
governor and the idle air bypass for any carbon deposition.
Check the inlet pressure sensor, the air throttle sensor and
5
circuits.
Disassemble the nozzle and check any leakage or jam in the
6
nozzle with a nozzle cleaner & analyzer.
Check fuel and observe any trouble attributed to fuel just
7
added.
Check if the engine's ignition timing is conformable to
8
specifications.
9 Check the exhauster for exhaust normally discharged.
Connect an EMS adapter and press the power switch to
10 check voltages at Pins 5#, 10#, and 23#; check grounding
at Pins 2# and 21#.
Information Summary and Preparation 1
Operating Procedure
22
Detection Subsequent
Results Steps
Check the air
Yes
intake system.
No Next step
Yes Next step
Repair the fuel
No
supply system.
Yes Next step
Adjustment or
No
replacement
Clean relevant
Yes
parts.
No Next step
Yes Next step
Correct circuits or
No replace any
sensor.
Replace the
Yes
defective nozzle.
No Next step
Yes Change fuel.
No Next step
Yes Next step
Correct ignition
No
timing.
Yes Next step
Repair or replace
No
the exhauster.
Yes Diagnosis assist
Repair the
No
relevant circuits.