| WARNING | Ensure residual fuel pressure is relieved before working on throttle body. |
- Relieve fuel pressure. See «FUEL PRESSURE RELIEF»(ref-20799-S36080439072001010300000) . Disconnect negative battery cable. Remove air intake ducts. Disconnect and mark electrical connections and vacuum hoses from throttle body. Disconnect control cables from throttle body.
- Drain cooling system and remove coolant hoses to throttle body (if applicable). Remove throttle body retaining bolts. Remove throttle body and gasket.
Note. Identification number is stamped on throttle body. Use identification number to order replacement components.
- To install, reverse removal procedure using NEW gasket. Tighten retaining bolts to specification. See «TORQUE SPECIFICATIONS»(ref-20799-S10724329482001010300000) . Refill cooling system (if drained).
- If installing new Idle Air Control (IAC) valve, ensure IAC pintle length setting is adjusted before installation. See «IDLE AIR CONTROL (IAC) VALVE»(ref-20799-S33363958282001010300000) . Adjust idle speed and TP sensor (if removed, and if adjustable). See «ON-VEHICLE ADJUSTMENTS»(ref-20599) article.
Relieve fuel pressure. See FUEL PRESSURE RELIEF . Disconnect negative battery cable. Remove intake manifold top cover. Disconnect pressure regulator vacuum hose. Remove pressure regulator retaining ring. Lift and twist pressure regulator from fuel rail. Remove fuel inlet "O" ring from pressure regulator. Remove and discard filter screen if dirty.
To install, reverse removal procedure. DO NOT reuse "O" rings. Lubricate fuel inlet "O" ring with oil and install in regulator. Replace filter screen as necessary. Tighten intake manifold cover nuts to specification. See TORQUE SPECIFICATIONS .