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1.2L REVOTRON ENGINE
10
2. Engine Idle Problems
Condition
Possible Cause
Remedy
Engine Starts but does not idle
Faulty ETC unit.
Perform Diagnosis test. Replace
as necessary.
Fuel filter if clogged.
Replace the fuel filter.
fuel lines are pinched or
clogged
Correct the routine to avoid pinch,
or allow shop air to clear the clog
in the fuel lines.
Improper Electrical supply at
pump connector
If electrical supply is in proper
check electrical system.
In adequate fuel pump
pressure
IF fuel pump does not built
pressure then replace.
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.
Fuel filter if clogged.
Replace the fuel filter.
fuel lines are pinched or
clogged
Correct the routine to avoid pinch,
or allow shop air to clear the clog
in the fuel lines.
Improper Electrical supply at
pump connector
If electrical supply is in proper
check electrical system.
In adequate fuel pump
pressure
IF fuel pump does not built
pressure then replace.
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.