Note. Identification number is stamped on base of upper intake manifold or on fuel pressure regulator. Identification number must be used for ordering replacement components.
Removal
- Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELIEF (CPI) under «FUEL SYSTEM»(ref-20112-S10526903702001010200000). Disconnect negative battery cable. Remove plastic cover on upper intake manifold. Disconnect electrical harness connectors from TP sensor, IAC valve, MAP sensor and intake manifold tuning valve assembly.
- Disconnect throttle and cruise control cables from upper intake manifold. Remove ignition coil, PCV hose and related vacuum hoses. Remove air cleaner snorkel.
- Mark location of all studs for proper reassembly. Remove upper intake manifold bolts and stud nuts. Remove upper intake manifold assembly. (Scheme 7) NOTE: DO NOT attempt to disassemble CPI assembly. CPI unit is not serviceable and should be replaced as an assembly.
- Remove injector wiring harness connector at CPI unit. Remove and discard fuel fitting clip. Disconnect fuel inlet and return lines, and fitting assembly. Discard "O" ring seal.
- To remove CPI assembly from intake manifold, squeeze poppet nozzle locking tabs together while lifting nozzle out of casing socket from each cylinder. After removing all the poppet nozzles (6), lift CPI assembly out of casing. (Scheme 7)
Installation
- To install, reverse removal procedure. Align CPI assembly grommet with casting grommet slots and push down on CPI until it is seated in bottom of guide hole. (Scheme 7)
- Push poppet nozzles into casting sockets. Ensure poppet nozzles are firmly seated and locked in casting socket. Install fuel inlet and return lines. Lubricate NEW "O" rings with clean engine oil.
- Pressurize fuel system and check for fuel leak. Install upper intake manifold assembly. Tighten upper intake manifold bolts and nuts in sequence to 88 INCH lbs. (10 N.m). (Scheme 8)
