Section 07
ENGINE MANAGEMENT (4-TEC)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
SMR2002-078 _07_03A.FM
07-03-13
Fuel Injector Replacement
Removal
Before removing the injectors, the fuel rail has to
be removed from the engine. Refer to REMOVAL
in FUEL RAIL REPLACEMENT for the procedure.
FUEL RAIL ASS’Y
1. Fuel injector
2. Injector clip
3. O-ring
Then remove the injector clip. Now the fuel injec-
tor can be easily pulled out of the fuel rail.
Installation
For the installation, reverse the removal proce-
dure. Paying attention to the following details.
Install new O-rings, if you reinstall a used injector
then insert the fuel injector in place with your hand.
Do not use any tool. Ensure clip and injector are
properly installed.
NOTE:
A thin film of engine oil should be applied
to O-rings to ease insertion in rail.
Apply Loctite 243 on rail retaining screws then torque
to 10 N•m (89 lbf•
in
).
ELECTRONIC MANAGEMENT
EMS ECU AND MPEM
REPLACEMENT
General
Prior to replacing a suspected EMS ECU or MPEM,
ensure that all the recommendations in the general
introduction of this section have been followed.
IMPORTANT:
When the EMS ECU is replaced,
the safety lanyard(s) and the
Closed Throttle and
Idle Actuator
must be reprogrammed/reset. Re-
fer to their specific section for adjustment.
To allow transferring the previous recorded informa-
tion from the old EMS ECU or MPEM to the new
one, use the vehicle communication kit (VCK) with
the B.U.D.S. software. Use
Replace EMS or MPEM
in the
ECU
menu. Follows instructions in its help sys-
tem.
NOTE:
If the old EMS ECU or MPEM is working, it
must be read inside B.U.D.S. prior to removing it
from the vehicle to carry vehicle information and his-
tory to the new EMS ECU or MPEM.
EMS ECU Replacement
Disconnect battery cables.
Disconnect both EMS ECU connectors from EMS
ECU.
1. EMS ECU
2. Retaining screws
Unscrew all retaining screws and remove the en-
gine EMS ECU from intake manifold.
Install the new EMS ECU to the engine.
Reconnect EMS ECU connectors to EMS ECU then
battery cables.
WARNING
Perform a fuel pressure test and ensure that
there is no leak. Refer to FUEL PUMP above.
Run engine and check for leaks.
1
2
R1503motr164A
3
WARNING
Battery BLACK negative cable must always
be disconnected first and connected last.
2
2
R1503motr180A
1
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