Download Fault Diagnosis - Generic Motor Danmark

e) Determine whether the cylinder is submerged
If so:
• Fully open throttle, connected to the starter, after a few seconds, the engine should begin
to work
f) Whether the crankshaft position sensor clearance is too large
16.4.3.3 Fault phenomenon - unable to start and accompanied by a tempering
a) Check whether high-voltage lines of the ignition coil high-voltage are tightened
b) Whether the timing gear ring is loose.
16.4.3.4 Fault phenomenon - unstable idle
Idle speed control
system:
Fuel supply
system:
Check whether idle speed bypass bolt of the is screwed too tight or loose, usually 2 laps
Whether there is leakage for tubing pipe.
16.4.3.5 Fault phenomenon—the idle is too high or too low (idle speed does not
match obviously)
Idle speed
is too high:
Idle speed
is too low:
‹ When the water temperature is below 68 degrees, the system will increase the idle to
accelerate the warm-up process, which is a normal phenomenon. Except for that, make
inspection according to the following steps
‹ Check whether the idle bypass holes are too big
‹ Valve clearance, especially whether the exhaust valve clearance is too large
‹ Check the fuel tank, fuel filter, oil pressure and nozzle
‹ Check whether the idle bypass holes are too small
‹ Check the valve clearance, whether the clearance is too small
16.4.3.6 Fault phenomenon—instable idle speed with deceleration flameout
a) Check the valve clearance
b) Check whether the idle bypass holes and throttle body are too dirty
16.4.3.7 Fault phenomenon—inability to accelerate
a) Whether the parameters are normal during Idle and high idle;
b) Check the fuel tank, fuel filter;
- 156 -