Linhai ATV 500-D T3 EFI, Service Manual

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CHAPTER 3 ENGINE
LH500ATV-D T3 EFI SERVICE MANUA 19.0
CHAPTER 3 ENGINE PAGE. 3- 12
Unstable Idle Speed
check ignition Timing Incorrect Faulty pulse generator
Faulty CDI unit
Correct
check carburetor
mixture screw
Correct
Incorrect
Refer to fuel system (Engine Service)
Check if secondary air
intake into carburetor
joint
No Air intake
Air intake Faulty tightening of carburetor joint
Faulty reed valve seal washer
Remove spark plug and mount it
to spark plug cap, get it earthed
and check spark
Normal spark
Remove fuel enrichment device
wire lead and check continuity
Normal Continuity
Connect fuel enrichment
device wire lead with
Weak spark or
No spark
No Continuity
Stained or damaged spark plug
Faulty Ignition coil
Faulty high tension coil or short circuit
Faulty ignition switch
Faulty CDI unit
Broken cable of fuel enrichment device
Faulty fuel enrichment device
battery for 5 Minutes.
Connect ethylene pipe
With Air current
Faulty fuel enrichment device
with fuel increment loop
and blow.
No air current
Clogged carburetor
.