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Revotron 1.2T
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2. Engine Idle Problems
Condition
Possible Cause
Remedy
Engine Starts but does not idle
Faulty ETC unit.
•
Perform Diagnosis test. Replace
as necessary.
Clogged or faulty fuel regulator
or pump.
•
Check fuel system components,
repair or replace as necessary.
Incorrect manifold absolute
pressure (MAP) sensor signal
input.
•
Check for leakage at sensor.
•
Perform diagnostic test.
Engine idles erratically
Disconnected
or
leaking
vacuum line or vacuum leak at
inlet manifold.
•
Inspect all vacuum lines and
connections. Repair or replace as
necessary.
Faulty ETC unit.
•
Perform diagnostic test. Replace
as necessary.
Incorrect valve / ignition timing.
•
Check timing system components
and repair or replace as
necessary.
Clogged or faulty fuel regulator
or pump.
•
Check fuel system components,
Repair or replace as necessary.
Improper firing order.
•
Check ignition system and fuel.
3. Poor Engine Performance
Condition
Possible Cause
Remedy
Maximum RPM -low
Insufficient
battery
voltage/charge - test battery
and charging system.
•
Clean
and
tighten
battery
connections
•
Jump start engine.
•
Battery or charging system
component faulty. Replace as
necessary.
Obstructed air filter or air inlet
•
Clean or replace air filter or inlet.
Improper
grade
or
contaminated fuel
•
Rush fuel system with fresh,
clean, fuel of the correct type.
Replace fuel filter.
Faulty spark plugs, wires, or
ignition coil
•
Check
ignition
system
components for proper operation.
Replace as necessary.
Malfunctioning
engine
management
system
component
•
Perform engine management
system
diagnostic
test
as
described in this section of the
manual.
Clogged or faulty fuel filter,
fuel regulator, fuel line, or fuel
pump
•
Check fuel system components,
repair or replace as necessary.
Incorrect crank angle signal
•
Check sensor gap and adjust to
1.4 ± 0.4mm
Clogged
or
faulty
fuel
injector(s)
•
Check fuel injector operation.
Replace as necessary.
Improper firing order
•
Check ignition system and fuel
injector connections. Rectify as
necessary.