Lexus ES300 (1997 year). Manual — part 521

S04505

SF074–04

S04498

S06086

Fuel Hose
Clamp

S05352

S04499

SF–18

–

SFI

INJECTOR

869

1997 LEXUS ES300 (RM511U)

REMOVAL

1.

REMOVE AIR CLEANER HOSE

2.

REMOVE AIR INTAKE CHAMBER ASSEMBLY
(See page

EM–30

)

3.

DISCONNECT INJECTOR CONNECTORS

4.

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:

Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions.

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:

Be careful not to drop the injectors when removing
the delivery pipes.

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

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

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

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

Fuel drop: 1 drop or less per minute

(b)

Turn the ignition switch to LOCK.

(c)

Disconnect the negative (–) terminal cable from the bat-
tery.

(d)

Remove the SST and fuel tube connector.
SST

09268–41046, 09842–30070

CAUTION:

Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions.

As there is retained pressure in the fuel pipe line, pre-
vent it from splashing inside the engine compart-
ment.

(e)

Disconnect the LEXUS hand–held tester from the DLC3.