Attention! To replace parts, there is no need to remove and disassemble the throttle pipe. However, for the sake of clarity, the procedures here assume that the TBI module has been removed from the vehicle.
1. Decompress the fuel system.
2. Disconnect the battery from the ground.
3. Remove the air filter, adapter and gaskets.
Fuel Meter Cover/Fuel Pressure Regulator Assembly
Attention! The pressure regulator is located in the cover of the fuel flow meter. In the event of a flow meter or regulator failure, the entire assembly is replaced.
4. Disconnect the connectors from the injectors.
5. Loosen the screws (see photo) and remove the cover.
6. Remove old seals (see photo).
7. Inspect and clean the cover. The cap must not be immersed in solvent as the diaphragm and pressure regulator gasket will be damaged.
Attention! Do not loosen the 4 screws securing the pressure regulator to the cover (see photo), to avoid damage to the diaphragm from the release of the regulator spring.
8. Install the assembly in reverse order, replacing the gaskets and seals.
Nozzles
9. Disconnect the connectors from the injectors by squeezing the latch tabs and pulling the connector towards you.
10. Remove the cover with the flow meter/pressure regulator.
11. Pry up and remove the nozzle (see photo).
12. Remove the top (more) and bottom (lesser) O-rings and nozzle filter.
13. Get a steel washer from a nozzle.
14. Inspect the fuel injector filter. If contamination is found, clean the fuel lines and flush the fuel tank.
15. When replacing, be aware that Model 220 TBI system nozzles are not interchangeable with nozzles from other systems.
16. When assembling, put a new filter on the nozzle nozzle (see photo).
17. Lubricate the new bottom (lesser) o-ring with automatic transmission fluid and install it in the seat of the shoulder in the well under the injector (see photo).
18. Install a steel washer in the nozzle (see photo).
19. Lubricate the new upper O-ring with automatic transmission fluid and install it on the steel washer (see photo).
Attention! The washer and large o-ring must be installed in front of the nozzle. Do not twist this ring.
20. Install nozzle (see photo).
21. Install all removed parts.
Throttle Angle Sensor (TPS sensor) and idle air valve (IAC valve)
22. See Chapter 6 for how to replace these throttle body parts.
Fuel gauge housing
23. Disconnect the connectors from the injectors.
24. Remove fuel gauge/pressure regulator cap, gasket, and pressure regulator seal.
25. Remove nozzles.
26. Disconnect fuel lines, remove sealing rings.
27. Turn away nuts and disconnect fuel pipes from the case of a fuel flow meter (see photo). Pay attention to the location of the nuts that should be tightened in place. Larger intake pipe nut holes.
28. Get from nuts of a lining.
29. Loosen the screw and remove the flowmeter housing (see photo).
30. Assembly is carried out in the reverse order. Replace all seals of disassembled joints.