2007 FORD FIESTA Workshop Manual

Engine Emission Control - 2.OL Duratec-HE
303-08B-3
(MI41 303-08B-3
DESCRIPTION AND OPERATION
Engine Emission Control
1 2 1 EGRvalve gasket I oxide exhaust emissions.
Item Description introduced to the incoming charge in the intake
1
The exhaust gas recirculation (EGR) system allows
intake manifold by the EGR valve.
Exhaust gas recirculation (EGR) valve
--
3
a measured quantity of exhaust gas to be directed The EGR valve is controlled by an input from the back
to the intake manifold. The exhaust gas is powertrain control module
manifold, where it dilutes the air fuel mixture and
lowers the peak gas temperature, reducing nitrogen
2006.0 Fiesta 1212006 G37563en
the cylinder head from the exhaust manifold to the
-
EGR outlet The exhaust gas
is drawn through a passage within
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Engine Emission Control - 2.OL Duratec-HE
303-08B-4
(MI41 303-08B-4
DESCRIPTION AND OPERATION
Item Description two hoses. One PCV hose connects the PCV valve
to the intake manifold, the other PCV hose
2
3
The positive crankcase ventilation (PCV) system
consists of a valve mounted in the crankcase vent
oil separator (attached to the cylinder block) and
connects the valve cover to the air cleaner. 1
4
2006.0 Fiesta 1212006 G37563en
Positive crankcase ventilation (PCV) valve
PCV hose
Crankcase vent oil
se~arator
Under idle and part throttle conditions, the
crankcase vapor flows through the intake manifold
Crankcase vent oil separator retaining
bolt into the combustion chambers where the vapor is
burnt during combustion.
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Engine Emission Control - 2.OL Duratec-HE
303-08B-5
(MI41 303-08B-5
DESCRIPTION AND OPERATION
[ E57308
i, ' Item Description I
I 1 ( PCV hose to valve cover connector I
Under full throttle conditions, the crankcase vapor
flows from the valve cover into the air cleaner
through the PCV hose.
-
2
3
2006.0 Fiesta 1212006 G37563en
PCV hose
PCV hose to air cleaner connector
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Engine Emission Control - 2.OL Duratec-HE
303-08B-6
(MI41 303-08B-6
DIAGNOSIS AND TESTING
Engine Emission Control
lnspection and Verification
General Equipment Visual Inspection Chart L..
I. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
Worldwide Diagnostic System
(WDS)
- Hose(s)/hose joints
- Gasket(s)
- Positive crankcase
ventilation (PCV)
valve
- PCV separator
Mechanical
- Exhaust gas recircu-
lation (EGR) valve
Electrical
- Electrical
con
nector(s)
- Wiring harness
- Fuse(s)
- Relay
- EGRvalve
- Powertain control
module (PCM)
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the concern is not visually evident, verify the
symptom and refer to the Symptom Chart.
Symptom Chart
Symptom Chart
Symptom Possible Sources Action
I
Poor engine performance EGR valve.
Using WDS, CHECK the EGR
Valve Duty Cycle input signal
I to the EGR vacuum regulator
valve. If the result is 0%,
REMOVE the EGR valve.
REFER to Exhaust Gas Recir-
culation (EGR) Valve
- in this
section.
INSPECT the EGR valve and
valve seat for damage. Make
sure that the EGR valve is in
the closed position. If the EGR
valve is not closed. INSTALL
a
new EGR valve. TEST the
system for normal operation. If
the result is not 0% continue
the engine diagnostic using
WDS.
2006.0 Fiesta 1212006 G334290en
Excessive crankcase pressure Blocked or damaged PCV
hose(s).
Blocked crankcase vent oil
separator. CHECK
the PCV system
components for blockages, CLEAN or INSTALL new
components as necessary.
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Engine Emission Control - 2.OL Duratec-HE
303-08B-7
(MI41 303-08B-7
DIAGNOSIS AND TESTING
Symptom Possible Sources
Action
Worn or damaged engine
components. REFER to Section 303-01A
[Engine -- 1.25L Duratec-I 6V
(Sigma)/l.4L Duratec-1 6V
(Sigma)ll .6L Duratec-1 6V
(Sigma)] 1 303-01 B [Engine --
1.4L Duratorq-TDCi (DV)
Diesel] 1 303-01 C [Engine
--
1.3L Duratec-8V (Rocam)] I
303-01 D [Engine -- 2.OL
Duratec-HE (M 14)] 1 303-01 E
[Engine
-- 1.6L Duratorq-TDCi
(DV) Diesel].
2006.0 Fiesta 1212006 G334290en ~
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Engine Emission Control - 2.OL Duratec-HE
(MI41
REMOVAL AND INSTALLATION
Exhaust Gas Recirculation (EGR) Valve
1. Drain the cooling system.
For additional information, refer to: Cooling
Special
Tool(s) 3.
Remove the air cleaner intake tube.
System Draining, Filling and Bleeding
24003
(303-03 Engine cooling - 2.01 Duratec-HE
(M14), General Procedures).
4. Using the special tool, disconnect the
2. Remove the air cleaner outlet pipe.
radiator upper coolant hose from the coolant
outlet connector.
Removerllnstaller, Coolant
Hose Clamp
303-397
5. Remove the components in the order
indicated in the following
illustration(s) and
table(s).
2006.0 Fiesta 1212006 G421887en
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Engine Emission Control - 2.OL Duratec-HE
(MI41
REMOVAL AND INSTALLATION
I
' Item Description
I 1 I EGR valve electrical connector I
I * 1
EGR valve coolant hose
See Removal Detail
6. To install, reverse the removal procedure.
2006.0 Fiesta 1212006 G421887en
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Engine Emission Control - 2.OL Duratec-HE
303-08B-10 (MI41 303-08B-10
REMOVAL AND INSTALLATION
Crankcase Vent Oil Separator
Removal
I. Remove the intake manifold. For additional Discard the gasket.
information, refer to Section 303-OIA
[Engine
-- 1.25L Duratec-1 6V (Sigma)ll.4L
Duratec-I 6V (Sigma)ll .6L Duratec-I 6V
(Sigma)] I 303-01 B [Engine -- 1.4L
Duratorq-TDCi (DV) Diesel] I 303-01 C [Engine
-- 1.3L Duratec-8V (Rocam)] I 303-01 D
[Engine
-- 2.OL Duratec-HE (M14)] 1 303-01 E
[Engine
-- 1.6L Duratorq-TDCi (DV) Diesel].
2. Disconnect the positive crankcase ventilation
(PCV) hose from the PCV valve.
Installation
I. N0TE:lnstall a new crankcase vent oil
separator gasket.
To
install, reverse the removal procedure.
3. Remove the PCV
valve from the crankcase
vent
oil separator.
1. Push in the locking tangs.
2. Twist the PCV valve to remove.
4. Remove the crankcase vent oil separator.
- - --
2006.0 Fiesta la2006 G37566en
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