Section 06 ENGINE MANAGEMENT (RFI)
Subsection 03 (COMPONENT INSPECTION )
Install a fuel pressure gauge (P/N 529 035 591) to
the quick connect fitting of the fuel hose.
F02B0BA
FUEL PRESSURE GAUGE (P/N 529 035 591)
Install the safety lanyard cap on the switch to ac-
tivate the fuel pump. The fuel pressure should be
between 386 - 414 kPa (56 - 60 PSI).
If the pressure is too high, replace the fuel pump
module.
If the pressure is too low, check the following
components:
– fuel hoses and connections
– fuel filter
– fuel pump
– regulator
– voltage at fuel pump (minimum 8 Vdc).
FUEL INJECTOR
To control the emission, RFI engine has been de-
signed to work with only the MAG side injector
at idle. While working at 2500 RPM and below,
engine gradually goes from two cylinder to one at
idle.
1
F07F0CA
2
3
4
5
6
7
1. Inlet side
2. Filter
3. Wiring terminal
4. Coil
5. Plunger
6. Needle valve
7. Injection side
Touch the injector while cranking the engine to
feel the operation of the injector.
If there is no signal detected from the injector,
disconnect the plug connector from the injector
and check the signal from the MPEM.
To check the signal, verify voltage at the plug con-
nector. There should be at least 6 Vdc while crank-
ing engine.
Check the resistance of the fuel injector circuits.
Disconnect the AMP plug connector #4 on the
MPEM.
Using a multimeter, check resistance value be-
tween terminal as follows.
INJECTOR CONTACT LOCATION
Injector no. 1 18 and 20
Injector no. 2 19 and 21
310 smr2004-Complete Line Up
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