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Cause
Correction (1). Ignition coil connection loose or damaged Connect ignition coil or replace ignition coil (2). Vacuum leakage in intake manifold
Replace sealing gasket or replace connecting pipe ( 3). Mail measuring orifice blocked
Check and clean mail measuring orifice ( 4). Idle cut-off valve damaged and not open
Check circuit and solenoid ( 5). Idle speed too low
Adjust engine idle speed ( 6). Idle speed fuel outlet port or transition port blocked Check and clean 7.Rough engine idle speed Cause
Correction (1). Air filter core blocked
Clean or replace (2). Vacuum leakage in Intake manifold or relevant hose Check and service Spark plug gap not correct Replace spark plug (4). Hydraulic valve lifting rod damaged Replace the lifting rod ( 5). Low or unstable Cylinder compression pressure Check and service ( 6). Timing belt tightening incorrectly
Adjust timing belt tension
Correction ( 1). Spark plug corroded, damaged or Spark plug gap not right. Replace spark plug ( 2). High tension wire damaged
Replace high tension wire ( 3). Ignition timing not correct
Adjust ignition timing ( 4). Hydraulic valve lifter damaged
Replace Hydraulic valve lifting rod ( 5). Low or unstable cylinder compression pressure Check and service ( 6). PCV hose loose, leaking, or damaged
Connect or replace
Correction ( 1). Intake manifold or connecting hose vacuum leakage Check, service or replace ( 2). Spark plug corroded, damaged or Spark plug gap abnormal Replace spark plug |