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.Do NOT smoke or have anything in area that can ignite fuel!CAUTION!Fuel under pressure! Cover the fuel rail test measuring point with a rag to protect againstfuel spray when removing the sealing screw.connect pressure tester to fuel rail using adaptorVAG 1318 VAG 1318/10CAUTION!Shut-off valve for VAG 1318 pressure tester must be closed.The lever (arrow) must beperpendicular to the direction of flow.start engine and let idleobserve fuel pressure on gaugemust be approx.3.5 bar gauge pressuredisconnect hose from fuel pressure regulator(arrow)fuel pressure must increase to approx.4.0 bar gauge pressure, after 10 minutes,gauge pressure must not be less than 2.5 barIf after 10 minutes gauge pressure is less than 2.5 barcheck for leaks in systemstart engine and after fuel pressure builds up, switch ignitionOFFat same time, clamp blue return line tightly and observe pressure drop on pressuregauge Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-460-2)If pressure does dropNOTfuel pressure regulator is defectiveIf pressure drops againcheck if:line connections are tightO-rings or seals on fuel distributor leakfuel injectors leakfuel pump check valve leaksPressure tester leaks (at shut-off valve)VAG 1318NotesDrain any residual fuel from the pressure tester before disconnecting it from the fuel rail. Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-470-1)Fuel injectors, checkingWARNING!Fire hazard.Do NOT smoke or have anything in area that can ignite fuel!Removingremove ignition wire guidesremove suction hose from hot wire Mass Air Flow ( ) sensorMAFdisconnect hose to EVAP solenoid valve at throttle bodydisconnect harness connector from TP (throttle position) sensordisconnect IAC (idle AIR control) valvedisconnect accelerator cable from throttledisconnect coolant hoses from throttle body and plug offdisconnect connector hose from heated tubeunclip fuel lines at cylinder head cover and remove from fuel raildisconnect vacuum hose from fuel pressure regulatorremove intake manifold, upper sectionunclip lines to fuel injectors from wiring guideremove wiring guideremove fuel injectors and fuel rail as an assemblyNotesIf the injectors are too tight within the holes of the lower section of the intake manifold; carefullypry under the valve body using wrench.SW 16Installinginstall in reverse order of removalNotesUse care when installing the fuel injectors to avoid damaging the O-rings.Lightly lubricate the O-rings with oil to ease assembly.Fuel injectors, checkingremove upper section of intake manifold (see previous section) Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-470-2)Electrical, checkingdisconnect harness connectors from all fuel injectorsswitch multimeter to resistance rangeFluke 83connect multimeter to terminals of fuel injector connector using jumper wires from2adaptor kitVW 1594must be 15 to 21.5 OhmsIf 0 Ohms (continuity)check for short circuit in wiring using wiring diagram, repair or replace as necessaryIf wiringOKreplace fuel injector(s)disconnect harness connector from ignition coil power output stagecheck voltage supply to each injectorconnect LED tester between terminals of harness connector usingUS 1115 1jumper wires from adaptor kitVW 1594operate starterLED tester must flickerIfNOre-connect the harness connector(s) to fuel injector(s)check for open circuit in wiring between fuel injectors (N 30, N 31, N 32, N 33, N 83,) and engine control module using wiring diagram, repair or replace asN 84necessary, see Repair Group 01 (Fuel injection and Ignition) Test steps through8 13 Checking spray pattern and for leaks Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-470-3)disconnect harness connector from blue engine coolant temperature (ECT) sensor( )G 62preset digital potentiometer to 15,000 OhmsVAG 1630connect the harness connector to the potentiometer using jumperECT VAG 1630wires from the adaptor kitVW 1594NotesIf the potentiometer is not available; use adaptor by connecting the 15,000VAG 1630 VAG 1490Ohm side directly to the harness connector.ECTfuel injectors remain electrically connectedfeed and return line remain connected to fuel railNotesThere is a tool ( ) that can be used to measure the fuel quantity output of the fuelVAG 1602injectors, simultaneously.If a is not available, an acceptable method would be toVAG 1602substitute 6 separate beakers to collect the fuel and a single graduated beaker to measure eachof the accumulations individually.adjust location of measuring tubes in to align with fuel injectors on fuelVAG 1602railinsert injectors into each of the measuring tubesVAG 1602operate starter for several seconds and observe spray patternspray pattern must be the same for all injectorsswitch ignition for approx.5 seconds and check for injector leakageONno more than 2 drops per injector is allowedempty (or equivalent) of any residual fuelVAG 1602NotesWhen installing the fuel injectors, be sure that the O-rings in the fuel rail are not damaged.Alwaysreplace damaged O-rings [ Pobierz całość w formacie PDF ]
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.Do NOT smoke or have anything in area that can ignite fuel!CAUTION!Fuel under pressure! Cover the fuel rail test measuring point with a rag to protect againstfuel spray when removing the sealing screw.connect pressure tester to fuel rail using adaptorVAG 1318 VAG 1318/10CAUTION!Shut-off valve for VAG 1318 pressure tester must be closed.The lever (arrow) must beperpendicular to the direction of flow.start engine and let idleobserve fuel pressure on gaugemust be approx.3.5 bar gauge pressuredisconnect hose from fuel pressure regulator(arrow)fuel pressure must increase to approx.4.0 bar gauge pressure, after 10 minutes,gauge pressure must not be less than 2.5 barIf after 10 minutes gauge pressure is less than 2.5 barcheck for leaks in systemstart engine and after fuel pressure builds up, switch ignitionOFFat same time, clamp blue return line tightly and observe pressure drop on pressuregauge Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-460-2)If pressure does dropNOTfuel pressure regulator is defectiveIf pressure drops againcheck if:line connections are tightO-rings or seals on fuel distributor leakfuel injectors leakfuel pump check valve leaksPressure tester leaks (at shut-off valve)VAG 1318NotesDrain any residual fuel from the pressure tester before disconnecting it from the fuel rail. Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-470-1)Fuel injectors, checkingWARNING!Fire hazard.Do NOT smoke or have anything in area that can ignite fuel!Removingremove ignition wire guidesremove suction hose from hot wire Mass Air Flow ( ) sensorMAFdisconnect hose to EVAP solenoid valve at throttle bodydisconnect harness connector from TP (throttle position) sensordisconnect IAC (idle AIR control) valvedisconnect accelerator cable from throttledisconnect coolant hoses from throttle body and plug offdisconnect connector hose from heated tubeunclip fuel lines at cylinder head cover and remove from fuel raildisconnect vacuum hose from fuel pressure regulatorremove intake manifold, upper sectionunclip lines to fuel injectors from wiring guideremove wiring guideremove fuel injectors and fuel rail as an assemblyNotesIf the injectors are too tight within the holes of the lower section of the intake manifold; carefullypry under the valve body using wrench.SW 16Installinginstall in reverse order of removalNotesUse care when installing the fuel injectors to avoid damaging the O-rings.Lightly lubricate the O-rings with oil to ease assembly.Fuel injectors, checkingremove upper section of intake manifold (see previous section) Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-470-2)Electrical, checkingdisconnect harness connectors from all fuel injectorsswitch multimeter to resistance rangeFluke 83connect multimeter to terminals of fuel injector connector using jumper wires from2adaptor kitVW 1594must be 15 to 21.5 OhmsIf 0 Ohms (continuity)check for short circuit in wiring using wiring diagram, repair or replace as necessaryIf wiringOKreplace fuel injector(s)disconnect harness connector from ignition coil power output stagecheck voltage supply to each injectorconnect LED tester between terminals of harness connector usingUS 1115 1jumper wires from adaptor kitVW 1594operate starterLED tester must flickerIfNOre-connect the harness connector(s) to fuel injector(s)check for open circuit in wiring between fuel injectors (N 30, N 31, N 32, N 33, N 83,) and engine control module using wiring diagram, repair or replace asN 84necessary, see Repair Group 01 (Fuel injection and Ignition) Test steps through8 13 Checking spray pattern and for leaks Volkswagen Corrado 1990 - 1994Fuel Systems Supercharger Exhaust Engine ElectricalFuel Injection, AFC System (Page 24-470-3)disconnect harness connector from blue engine coolant temperature (ECT) sensor( )G 62preset digital potentiometer to 15,000 OhmsVAG 1630connect the harness connector to the potentiometer using jumperECT VAG 1630wires from the adaptor kitVW 1594NotesIf the potentiometer is not available; use adaptor by connecting the 15,000VAG 1630 VAG 1490Ohm side directly to the harness connector.ECTfuel injectors remain electrically connectedfeed and return line remain connected to fuel railNotesThere is a tool ( ) that can be used to measure the fuel quantity output of the fuelVAG 1602injectors, simultaneously.If a is not available, an acceptable method would be toVAG 1602substitute 6 separate beakers to collect the fuel and a single graduated beaker to measure eachof the accumulations individually.adjust location of measuring tubes in to align with fuel injectors on fuelVAG 1602railinsert injectors into each of the measuring tubesVAG 1602operate starter for several seconds and observe spray patternspray pattern must be the same for all injectorsswitch ignition for approx.5 seconds and check for injector leakageONno more than 2 drops per injector is allowedempty (or equivalent) of any residual fuelVAG 1602NotesWhen installing the fuel injectors, be sure that the O-rings in the fuel rail are not damaged.Alwaysreplace damaged O-rings [ Pobierz całość w formacie PDF ]