Start-Up Normal But Idle Speed Unstable Or Stall With Load - PGO Tigra AF-125BAE Service Manual

(9) Start-up normal but idle speed unstable or stall with load such as front lamp applied
General trouble location: 1. Idle governor; 2. Nozzle.
Procedure for general diagnoses:
No.
Remove the idle governor and check the air throttle, the idle
1
governor, and the idle air bypass for any carbon deposition.
Check if the engine's output power is increased with the load
applied; use the EMS diagnosis tester to check any change in
2
the ignition advance angle, duration of fuel injection, and air
input.
Disassemble the nozzle and check the nozzle leaking or
3 blocked, or the flow out of tolerance with a nozzle cleaner &
analyzer.
Connect an EMS adapter and press the power switch to check
4 voltages at Pins 5#, 10#, and 23#; check grounding at Pins 2#
and 21#.
Information Summary and Preparation 1
Operating Procedure
Detection
Results
19
Subsequent Steps
Yes Clean relevant parts.
No Next step
Yes Go to Step 4.
No Next step
No Repair the air
regulating system.
Change the defective
Yes
nozzle.
No Next step
Yes Diagnosis assist
Repair the relevant
No
circuits.