RA GP125i, Maintenance Manual

Page: 136 / 167

135
General diagnosis process:
：
No. Inspection steps Follow steps Remark
1 Check whether the air filter is blocked.
Inspect intake
system
2
Connect the fuel pressure gauge and start the engine to check
whether the fuel pressure of the engine is around 250kPa at all
working conditions.
Inspect fuel
system
3 Check spark plug and observe the type and clearance adjust or replace
4
The idle speed regulator is removed to check whether there is
carbon deposition in throttle body, idle speed regulator and
idle bypass.
Cleaning the
related parts
5 Check whether the ECU unit and its circuit are normal.
Inspect the
circuit or replace
the ECU
assembly
6 Check whether there is leakage or blockage in the injector. replace
7
Check whether the fuel label (and whether it contains ethanol)
meets the requirements of the vehicle.
replace fuel