1986 TOYOTA CAMRY V20 fuel pressure

Check that there is specified voltage between ECU terminals VF
and body ground. ¿ There is no voltage between ECU terminals VF and E 1.
Check wiring between ECU terminal E i and body ground.
Check for suction of air into exhaust system.
Check wiring between oxygen sensors and
ECU connectors. ¿¿ Check operation of oxygen sensors.Check for air leak from air intake system.
Check cold start injector.Check distributor and ignition system.
Replace oxygen sensors.* Rich malfunction only Check fuel pressure.
Check air flow meter.Check spark plugs.Repair air suction.
Repair or replace. Repair or replace_Repair or replace.
Repair or replace.
Repair or replace.Repair or replace.
Repair or replace. Try another ECU.
Check injectors.
System normal.Repair air leak.
Repair wiring. BAD
BAD
BADBADBAD BAD
BAD
BAD
BAD BADBAD
± EFI SYSTEMTroubleshooting with Volt OhmmeterFI±66

2. DISCONNECT FUEL RETURN PIPE
(a) Put a suitable container or shop towel under the pressure
regulator.
(b) Remove the union bolt and two gasket, and disconnect the
return pipe from the pressure regulator.
HINT: Slowly loosen the union bolt.
REMOVAL OF FUEL PRESSURE
REGULATOR
1. DISCONNECT VACUUM SENSING HOSE
Fuel Pressure Regulator (3S±FE)
ON±VEHICLE INSPECTION
INSPECT FUEL PRESSURE (See page FI±70)
± EFI SYSTEMFuel System (Fuel Pressure Regulator (3S±FE))FI±84

INSTALLATION OF FUEL PRESSURE
REGULATOR
1. INSTALL FUEL PRESSURE REGULATOR
(a) Apply a light coat of gasoline to a new 0±ring, and
install it to the pressure regulator. 3. REMOVE FUEL PRESSURE REGULATOR
(a) Remove the two bolts, and pull out the pressure regulator.
(b) Remove the 0±ring from the pressure regulator.
2. CONNECT FUEL RETURN PIPE
Install the return pipe with two new gasket and the union
bolt.
Torque: 180 kg±cm (13 ft±Ib, 18 N±m)
3. CONNECT VACUUM SENSING HOSE
4. CHECK FOR FUEL LEAKAGE (See page FI±9) (b) Install the pressure regulator with the two bolts.
Torque: 55 kg±cm (48 in.±Ib, 5.4 N±m)
± EFI SYSTEMFuel System (Fuel Pressure regulator (3S±FE))FI±85

REMOVAL OF FUEL PRESSURE
REGULATOR
1. DISCONNECT VACUUM SENSING HOSE
2. DISCONNECT FUEL R RN HOSE
(a) Put a suitable container or shop towel under the
pressure regulator.
(b) Disconnect the return hose from the pressure regulator.
3. REMOVE FUEL PRESSURE REGULATOR
Loosen the lock nut, and remove the pressure regulator.
ON±VEHICLE INSPECTION
INSPECT FUEL PRESSURE (See page FI±70)
Fuel Pressure Regulator (2VZ±FE)
± EFI SYSTEMFuel System (Fuel Pressure Regulator (2VZ±FE))FI±86

INSTALLATION OF FUEL PRESSURE
REGULATOR
1. INSTALL FUEL PRESSURE REGULATOR
(a) Fully loosen the lock nut of the pressure regulator.
(b) Apply a light coat of gasoline to a new O±ring, and install
it to the pressure regulator.
(c) Thrust the pressure regulator completely into the deliv-
ery pipe by hand.
(d) Turn the pressure regulator counterclockwise until the
vacuum pipe faces in the direction indicated in the fig-
ure.
2. CONNECT FUEL RETURN HOSE
3. CONNECT VACUUM SENSING HOSE
4. CHECK FOR FUEL LEAKAGE (See page FI±9) (e) Tighten the lock nut.
Torque: 330 kg±cm (24 ft±Ib, 32 N±m)
± EFI SYSTEMFuel System (Fuel Pressure Regulator (2 Z±FE))FI±87

REMOVAL OF INJECTORS
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL
OF BATTERY
2. DISCONNECT COLD START INJECTOR PIPE
(See steps 2 and 3 on page FI±78)
3. DISCONNECT VACUUM SENSING HOSE FROM FUEL
PRESSURE REGULATOR (See step 1 on page FI±84)
4. DISCONNECT INJECTOR CONNECTORS
5. DISCONNECT FUEL HOSE FROM FUEL RETURN PIPE
6. REMOVE FUEL PRESSURE PALSATION DAMPER
Remove the pulsation damper and two gaskets.
7. REMOVE DELIVERY PIPE AND INJECTORS
(a) Remove the two bolts and delivery pipe together with four
injectors.
NOTICE: Be careful not to drop the injectors, when remov-
ing the delivery pipe.
(b) Remove the four insulators and two spacers from the cylin-
der head.
(c) Pull out the four injectors from the delivery pipe.
(a) Disconnect the fuel hose from the fuel filter outlet.
(b) Connect SST (union and hose) to the fuel filter outlet with
two new gaskets and the union bolt.
SST 09268±41045 (90405±09015)
HINT: Use the vehicle's fuel filter.
INSPECTION OF INJECTORS
1. INSPECT INJECTOR INJECTION
NOTICE: Keep clear for sparks during the test.
± EFI SYSTEMFuel System (Injectors (3S±FE))FI±89

(k) Connect SST (wire) to the injector and battery for 15
seconds, and measure the injection volume with a gradu-
ated cylinder. Test each injector two or three times.
SST 09842±30070
Volume: 45 ± 55 cc (2.7 ± 3.4 cu in.) per 15 sec.
Difference between each injector:
5 cc (0.3 cu in.) or less
If the injection volume is not as specified, replace the injec-
tor.
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: One drop or less per minute
(b) Disconnect the battery negative (±) cable.
(c) Remove SST and the service wire.
SST 09268±4.1045 (e) Install a new O±ring to the injector.
(f) Connect SST (union and hose) to the injector, and hold
the injector and union with SST (clamp).
SST 09268±41045
(g) Put the injector into the graduated cylinder.
HINT: Install the a suitable vinyl hose onto the injector to
prevent gasoline from splashing out
(h) Reconnect the battery negative H cable.
(i) Turn the ignition switch ON.
HINT: Do not start the engine
(j) Using SST, connect terminals +B and FP of the check
connector.
SST 49843±18020 (e) Remove the pressure regulator. (See page FI±84)
(d) Connect the fuel return hose and SST (hose) to the
pressure regulator with SST (union), two new gaskets
and union bolt.
SST 09268±41045 (09268±41080, 09268±41090)
± EFI SYSTEMFuel System (Injectors (3S±FE))FI±90

3. CONNECT FUEL RETURN HOSE
4. CONNECT INJECTOR CONNECTORS
5. CONNECT VACUUM SENSING HOSE
6. CONNECT COLD START INJECTOR PIPE
(See steps 2 and 3 on page FI±80)
7. CONNECT CABLE TO NEGATIVE TERMINAL OF
BATTERY 2. INSTALL FUEL PRESSURE PULSATION DAMPER
Install a new gasket, the fuel hose, a new gasket and the
pulsation damper.
± EFI SYSTEMFuel System (Injectors (3S±FE))FI±92