Fuel Rail & Injectors Cadillac Catera I

Note. If injector is replaced, ensure replacement injector has the same part number as injector removed.

Removal

1. Relieve fuel pressure. See «FUEL PRESSURE RELIEF»(ref-33451-S18511304212001122800000). Disconnect negative battery cable. Remove air intake duct (if necessary). Remove intake manifold plenum and gaskets.
2. Disconnect vacuum hose at fuel pressure regulator. Disconnect and plug fuel return line at pressure regulator. Disconnect and plug fuel inlet line at fuel rail. Disconnect electrical connectors from injectors.
3. Remove fuel rail retaining bolts. Remove fuel rail from intake manifold using equal force on both sides of fuel rail. (Scheme 1) Remove injector-to-fuel rail retaining clip (if equipped). Remove injectors from fuel rail. Remove injector "O" rings and discard.

Installation

To install, reverse removal procedure. Coat NEW injector "O" rings with clean engine oil. Install injector-to-fuel rail retaining clip with open end facing injector electrical connection. Position fuel rail on intake manifold. Push down on rail to seat injectors in manifold. Tighten fuel rail retaining bolts. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.

Scheme 1

Disconnect electrical connector from IAC valve. Remove IAC valve, gasket and "O" ring from throttle body assembly.

1. Inspect gasket or "O" ring for damage. Replace as necessary. Check extended distance of IAC pintle before installing. Damage will occur if measurement is incorrect. Distance must not exceed 1.100" (28 mm). Measurement should be taken from valve housing flange to end of pintle cone.
2. To retract NEW IAC valve pintle, slowly exert finger pressure on valve. Install NEW "O" ring or gasket on valve. Coat "O" ring with clean engine oil. Install IAC valve. Tighten IAC valve to specification. See «TORQUE SPECIFICATIONS»(ref-33451-S21394389782001122800000) . Reconnect electrical connector to IAC valve. To reset IAC valve, refer to ADJUSTMENTS article.