1985 Toyota Corolla FWD Repair Manual Fuel System&Carburetor

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...;... MEMO- FU-l FUEL SYSTE (GASOLINE) Page FU-2 FU-2 FU-3 FU-4 FU-30 FU-32 PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. TROUBLESHOOTING ON-VEHICLE INSPECTION.................... CARBURETOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. FUEL PUMP................................ FUEL TANK AND LINE FU-2 FUEL SYSTEM - Precautions, Troubleshooting PRECAUTIONS 1. Before working on the fuel system, disconnect from the negative battery term inal, When wo
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  ...;...EMO-  FU-l FUELSYSTE (GASOLINE) Page PRECAUTIONS..............................FU-2TROUBLESHOOTINGFU-2ON-VEHICLEINSPECTION....................FU-3CARBURETOR..............................FU-4FUELPUMP................................FU-30FUELTANKANDLINEFU-32  FU-2FUELSYSTEM-Precautions,Troubleshooting PRECAUTIONS 1.Beforeworkingonthefuelsystem,disconnectfromthenegativebatteryterminal,2.Whenworkingonthefuelsystem,keepaway'siblefirehazardsanddonotsmoke.3.Keepgasolineoffrubberorleatherparts.4.Workononlyonecomponentgroupatatimavoidconfusionbetweensimilarlookingparts.5.Keepworkareacleantoavoidcontaminationaburetorandcomponents.6.Becarefulnottomixuporloseclipsorsprings. TROUBLESHOOTING ProblemEnginewillnotstart/Hardtostart(cranksOK)RoughidleorstallsEnginehesitates/PooraccelerationPossiblecauseCarburetorproblems I) ChokeoperationoNeedlevalvestickingorcloggedoVacuumhosedisconnectedordamagedoFuelcutsolenoidvalvenotopenCarburetorproblemsoldiespeedincorrect I) SlowjetcloggedoIdlemixtureincorrect I) Fuelcutsolenoidvalvenotopen I) Fastidlespeedsettingincorrect(coldengine)oChokevalveopen(coldengine)EBCVvalveopenEBCVhosedisconnectedordamagedOuterventcontrolvalvenotclosedCarburetorproblemsãFloatleveltoolow I) Acceleratorpumpfaulty I) Powervalvefaulty I) Chokevalveclosed(hotengine)oChokevalvestuckopen(coldengine)FuellinecloggedRemedyCheckchokesystemECheckfloatandneedlevalveFCheckfuelcutsolenoidvalveFAdjustidlespeedFAdjustidlemixtureFCheckfuelcutsolenoidvalveFAdjustfastidlespeedFCheckchokesystemECheckEBCV E CheckhosesCheckouterventcontrolvalveEAdjustfloatlevel F Checkpowerpistonandvalve F Checkchokesystem E CheckchokesystemCheckfuellineFEnginedieseling(runsafterignitionswitchisturnedoff)CarburetorproblemsoLinkagestickingoIdlespeedorfastidlespeedoutofadjustmentoFuelcutsolenoidfaultyAdjustidlespeedorfastidlespeedCheckfuelcutsolenoidvalve FF PoorgasolinemileageCarburetorproblems I) Chokefaulty I) IdIespeedtoohigh I) DecelerationfuelcutsystemfaultyoPowervalvealwaysopenFuelleakCheckchokesystemAdjustidlespeedCheckdecelerationsystem E F Repairasnecessarysupplytocarburetor F FuelfiltercloggedFuelpumpfaultyFuellinecloggedFuellinebentorkinkedReplacefuelfilterReplacefuelpumpCheckfuellineReplacefuelline  FUELSYSTEM-On-VehicleInspectionFU-34.CHECKAUTOMATICCHOKESYSTEM ___________81_66-'1 (SeepageEC-39) ON-VEHICLEINSPECTION 1.REMOVEAIRCLEANER2.CHECKCARBURETORANDLINKAGE(a)Checkthatthevarioussetscrews,plugsandunionboltsaretightandcorrectlyinstalled.(b)Checkthelinkageforexcessivewearandmissingsnaprings.(c)Checkthatthethrottlevalvesopenfullywhentheacceleratorpedalisfullydepressed.3.CHECKFLOATLEVELCheckthatthefloatlevelisevenwiththecorrectlevelinthesightglass.Ifnot,checkthecarburetorneedlevalveandfloatlevel,andadjustorrepair,asnecessary. COLDENGINE 5.CHECKCHOKEBREAKERSYSTEM(SeepageEC-41)6.CHECKCHOKEOPENERSYSTEM(SeepageEC-43)7.CHECKTHROTTLEPOSITIONERSYSTEM(SeepageEC-14)8.CHECKAAPSYSTEM(SeepageEC-46) HOTENGINE 9.CHECKCHOKEBREAKERS~{STEM(SeepageEC-41) '*'\\\ 10.CHECKCHOKEOPENERSYSTEM(SeepageEC-43)11.CHECKTHATCHOKEVALVEOPENSFULLY12.CHECKAAPSYSTEMANDDIAPHRAGM(SeepageEC-46)13.CHECKACCELERATORPUMPOpenthethrottlevalve,andcheckthatgasolinespurtsoutfromtheaccelerationnozzle.14.CHECKANDADJUSTTPSETTINGSPEED(Seestep8onpageFU-25)15.CHECKANDADJUSTFASTIDLESPEED >41 (Seestep7onpageFU-24) J-24 16.INSTALLAIRCLEANER17.CHECKANDADJUSTIDLESPEED(Seestep6onpageFU-24)18. IF NECESSARY,ADJUSTIDLEMIXTURE(SeepagesFU-26,27)
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