49 / 1133
1.2L REVOTRON ENGINE
11
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.
MIL & SIL check
Check using diagnostic tool for
MIL & SIL. Take corrective action.
Defective EMS unit
Check using diagnostic tool. .
Take corrective action.
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.
Incorrect MAP sensor signal
Check and replace if necessary.
Defective EMS ECU
Check using diagnostic tool. .
Take corrective action.
Clogged injector
Check for clogged injector. Take
corrective action.