Direct Injector - SeaDoo GTI Shop Manual

Section 07 ENGINE MANAGEMENT (DI)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
1. Push clip toward injector to release connector
Gently pull rail up by hand, working each side
slightly at a time.
Pull rail out.
Disconnect hose ends at their inline connectors
and drain fuel rail.
Disconnect air and fuel hoses from rail.
1. Air and fuel return hoses
2. Fuel supply hose
350
NOTE: When lifting/removing air/fuel rail, we rec-
ommend replacing carbon dams on direct injec-
tors that have been running for 50 hours or more.
Remove fuel injectors, fuel pressure regulator and
air pressure regulator.
Installation
For installation, reverse the removal process but
pay attention to the following.
NOTE: A thin film of injection oil may be applied
on O-rings of fuel injectors to ease rail installation.
Apply Loctite 243 on rail retaining screws then
torque to 25 N•m (18 lbf•ft).
When connecting fuel or air hose fittings to the air/
fuel rail, use Loctite Krylox (no. 29-719).

DIRECT INJECTOR

When any direct injector is defective, while replac-
ing it make sure to check the other one as well.
Also check fuel injectors. Replace if defective.
The direct injectors can be replaced by lifting the
air/fuel rail.
Leakage Test
If direct injector leaks through its large top O-ring,
there will be an air/fuel leak between the injector
and the air/fuel rail. Replace O-ring of both injec-
tors.
If there is an injector internal leak, the high tem-
perature from the combustion chamber will make
visible overheated area. Replace damaged com-
ponents.
Electrical Test
Using the vehicle communication kit (VCK) with
the B.U.D.S. software, energize the direct injector
in the ACTIVATION section.
If the injector does not work, disconnect the con-
nector from the injector.
Install a temporary connector on the injector with
wires long enough to make the connection out-
side the bilge and apply voltage (12 V) to this test
harness.
This will validate its mechanical and electrical op-
eration.
If it does not work, replace the direct injector.
www.SeaDooManuals.net
smr2004-Complete Line Up