Maintenance Manual for J2 Sedan
Electronic Control System
231
Trouble phenomenon 5: Engine speed is normal, but it is difficult to start all the time
General trouble position:
1.
2. Fuel injection pump; 3.Coolant temperature sensor; 4.Fuel injector;
5.Ignition coil; 6.Throttle body and idle bypass air passage; 7.Intake passage; 8.Ignition timing;
9.Spark plug; 10.Mechanical part of engine
General diagnosis procedure:
No.
step
Connect the fuel pressure gauge (the access point is
end of the induction manifold of the fuel distribution pipe
assembly) to the engine and start the engine to check whether the
reading of fuel pressure gauge at idle condition is at
about
260kPa. Disconnect vacuum hose on pressure regulator and
observe whether fuel pressure is
about 300kPa.
system
3
Pull out the high-voltage wire of
one of the cylinders and connect
the spark plug to keep the spark plug electrodes about 5mm away
from the engine body, then start the engine to check whether there
Check the spark plug of each cylinder to observe whether m
and gap are in compliance with the
e
5
Pull out the connector of coolant temperature sensor and start the
engine to observe whether the engine is successfully started at this
6
to start.
7
Dismantle the fuel injector and check whether t
blockage in the fuel injector with cleaning analyzer special
for
8
Check fuel condition and observe w
hether the trouble
phenomenon occurs just after adding the
fuel.
9
Check pressure of all the cylinders and observe whether the
pressure of engine cylinder is insufficient.
Check whether the ignition sequence of engine and
Turn on the ignition switch and
check whether the power s
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