REMOVE AIR ASSIST HOSES AND PIPE(a)Disconnect the air assist pipe from the bracket on theNo.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) fromthe fuel filter.CAUTION:zPerform disconnecting operations of the fuel tubeconnector (quick type) after observing the precau-tions.zAs there is retained pressure in the fuel pipe line, pre-vent it from splashing inside the engine compart-ment.6.REMOVE DELIVERY PIPES AND INJECTORSNOTICE:zBe careful not to drop the injectors when removingthe delivery pipes.zPay attention to put any hung load on the injector toand from the side direction.(a)Remove the 5 bolts and delivery pipes together with the6 injectors and fuel pipe.(b)Remove the 4 spacers from the intake manifold.(c)Pull out the 6 injectors from the delivery pipes.
–SFIINJECTORSF–19870AuthorĂ:DateĂ:1997 LEXUS ES300 (RM511U)(d)Remove the 2 O–rings and 2 grommets from each injec-tor.
SF075–06S05356SST(Clamp)SST(Union)InjectorSST(Hose)Fuel Filter(On Vehicle)Fuel Tube ConnectorS05359Fuel Tube ConnectorS05357Fuel Tube ConnectorSST(Hose)Fuel FilterP01078SST(Hose)SST(Union)O–ringSST(Clamp)Vinyl TubeS05456LEXUSHand–Held TesterSF–20–SFIINJECTOR871AuthorĂ:DateĂ:1997 LEXUS ES300 (RM511U)INSPECTION1.INSPECT INJECTOR INJECTIONCAUTION:Keep injector clear of sparks during the test.(a)Purchase the new No.1 fuel pipe and take out the fueltube connector from its pipe.Part No. 23801–20040(b)Connect SST (hose) and fuel tube connector to the fuelfilter outlet.SST09268–41046CAUTION: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 holdthe injector and union with SST (clamp).SST09268–41046(e)Put the injector into a graduated cylinder.HINT:Install a suitable vinyl hose onto the injector to prevent gasolinefrom splashing out.(f)Connect the LEXUS hand–held tester to the DLC3.(g)Turn the ignition switch ON and LEXUS hand–held testermain 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’smanual for further details.
P01077SST(Wire)BatteryP01010–SFIINJECTORSF–21872AuthorĂ: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 fuelpump 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.SST09842–30070Volume: 56 – 69 cm3(3.4 – 4.2 cu in.) per 15 sec.Difference between each injector:6 cm3(0.4 cu in.) or lessIf 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 fromthe injector.SST09842–30070
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Lexus, Fuel injection, SFI, LEXUS ES300, Throttle position sensor