Fuel Charging and Controls - 2.OL
303-048-23 Duratec-HE (M14) 303-04B-23
DIAGNOSIS AND TESTING
Symptom
Possible Sources Action
Fuel system leak(s). CHECK the system for fuel
leak(s). REPAIR or INSTALL
new parts as necessary.
I Fuel filter blocked. I INSTALL a new fuel filter. I
Incorrect engine oil.
INSTALL a new oil filter and
engine oil.
I Generator. 1. REFER to WDS. I
EGR valve sticking open. REFER to: Engine Emission
Control (303-08 Engine
Emission Control
- 2.OL
Duratec-HE (M 14), Diagnosis
and Testing).
Slipping
clutch. REFER to: Manual Transaxle
and Clutch (308-00,
Diagnosis and Testing).
ECT sensor.
--
Carry out a full engine
diagnosis using the guided
diagnostic menu in WDS.
Fuel injectors. INSPECT the fuel injectors.
CLEAN the fuel injectors or
INSTALL a new set of injectors
as required only after the
checks have been carried out.
PCM calibration. Using WDS, CHECK for the
availability of a calibration
update.
--
I . Incorrect valve timing. I CHECK the valve timing. I
Engine cuts out during hard
acceleration
Low cylinder compression.
CMP sensor. CHECK
the engine compres-
sion.
Carry out a full engine
diagnosis using the guided
diagnostic menu in WDS.
CKP sensor. Carry out a full engine
diagnosis using the guided
diagnostic menu in WDS.
Fuel rail fuel pressure sensor.
REFER to: Fuel System Pres-
sure Check (31
0-OOA,
General Procedures).
Carry out a full engine
diagnosis using the guided
diagnostic menu in WDS.
Low fuel system pressure.
2006.0 Fiesta 1212006 GI 65371 en
Check the fuel system pres-
sure.
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31 0-02B-3 Acceleration Control - 2.OL Duratec-HE (M14) 31 0-02B-3
DESCRIPTION AND OPERATION
position from the throttle position (TP) sensors to
make sure that the requested position has been
lachieved .
N0TE:Do not install a new accelerator pedal
unless a relevant accelerator pedal DTC has been
stored in the PCM. For additional information refer
to WDS.
The accelerator pedal is a non-serviceable
component which cannot be adjusted and therefore
must not be disassembled or tampered with.
The throttle body is directly controlled by the PCM
and has two TP sensors, TP
1 and TP 2. The TP
sensors output a voltage to the PCM that
corresponds to the actual throttle plate position.
When the throttle body motor is not being powered
up, the throttle plate sits open at approximately 8
degrees from the closed in-bore position. This
position (also referred to as the default position),
is maintained within the throttle body by two internal
compression return springs acting in opposing
directions, these springs are a non-serviceable
item.
The PCM continuously monitors both APP sensors
and both TP sensors to make sure that the system
,is functioning as expected. All acceleration control
( 'system concerns will be detected by the PCM and
the appropriate diagnostic trouble code (DTC) set.
The malfunction indicator lamp (MIL), located in
the instrument cluster will also be illuminated if a
concern is apparent. As the acceleration control
system is of a safety-critical nature, it is possible
that a system concern will result in a reduced
vehicle performance and a DTC stored in the PCM.
For additional information refer to WDS.
2006.0 Fiesta 1212006 G422706en
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