Remove air assist hoses and pipe a disconnect the air

REMOVE AIR ASSIST HOSES AND PIPE
(a) Disconnect the air assist pipe from the bracket on the
No.1 fuel pipe.
(b) Remove the air assist hoses from the intake manifold.
5. DISCONNECT FUEL INLET PIPE
(a) Remove the fuel hose clamp.
(b) Disconnect the fuel inlet pipe (fuel tube connector) from
the fuel filter.
CAUTION:
z
Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions.
z
As there is retained pressure in the fuel pipe line, pre-
vent it from splashing inside the engine compart-
ment.
6. REMOVE DELIVERY PIPES AND INJECTORS
NOTICE:
z
Be careful not to drop the injectors when removing
the delivery pipes.
z
Pay attention to put any hung load on the injector to
and from the side direction.
(a) Remove the 5 bolts and delivery pipes together with the
6 injectors and fuel pipe.
(b) Remove the 4 spacers from the intake manifold.
(c) Pull out the 6 injectors from the delivery pipes.

– SFI INJECTOR
SF–19
870 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
(d) Remove the 2 O–rings and 2 grommets from each injec-
tor.

SF075–06
S05356
SST
(Clamp)
SST
(Union)
Injector
SST
(Hose)
Fuel Filter
(On Vehicle)
Fuel Tube Connector
S05359
Fuel Tube Connector
S05357
Fuel Tube Connector
SST
(Hose)
Fuel Filter
P01078
SST(Hose)
SST(Union)
O–ring
SST
(Clamp)
Vinyl Tube
S05456
LEXUS
Hand–Held Tester
SF–20
– SFI INJECTOR
871 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
INSPECTION
1. INSPECT INJECTOR INJECTION
CAUTION:
Keep injector clear of sparks during the test.
(a) Purchase the new No.1 fuel pipe and take out the fuel
tube connector from its pipe.
Part No. 23801–20040
(b) Connect SST (hose) and fuel tube connector to the fuel
filter outlet.
SST 09268–41046
CAUTION:
Perform connecting operations of the fuel tube connector
(quick type) after observing the precautions.
HINT:
Use the vehicle’s fuel filter.
(c) Install the grommet and O–ring to the injector.
(d) Connect SST (union and hose) to the injector, and hold
the injector and union with SST (clamp).
SST 09268–41046
(e) Put the injector into a graduated cylinder.
HINT:
Install a suitable vinyl hose onto the injector to prevent gasoline
from splashing out.
(f) Connect the LEXUS hand–held tester to the DLC3.
(g) Turn the ignition switch ON and LEXUS hand–held tester
main switch ON.
NOTICE:
Do not start the engine.
(h) Select the active test mode on the LEXUS hand–held tes-
ter.
(i) Please refer to the LEXUS hand–held tester operator’s
manual for further details.

P01077
SST
(Wire)
Battery
P01010
– SFI INJECTOR
SF–21
872 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
(j) If you have no LEXUS hand–held tester, connect the pos-
itive (+) and negative (–) leads from the battery to the fuel
pump connector. (See page SF–6 )
(k) Connect SST (wire) to the injector and battery for 15 se-
conds, and measure the injection volume with a gra-
duated cylinder. Test each injector 2 or 3 times.
SST 09842–30070
Volume: 56 – 69 cm
3
(3.4 – 4.2 cu in.) per 15 sec.
Difference between each injector:
6 cm
3
(0.4 cu in.) or less
If the injection volume is not as specified, replace the injector.
2. INSPECT LEAKAGE
(a) In the condition above, disconnect the test probes of SST
(wire) from the battery and check the fuel leakage from
the injector.
SST 09842–30070