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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Removal, Overhaul & Installation >> Fuel Systems >> Intake Manifold >> Removal (Upper - 4.3L)

Removal (Upper - 4.3L)

  1. Disconnect negative battery cable. Disconnect breather tube at air cleaner outlet duct. Disconnect Intake Air Temperature (IAT) sensor harness connector. Remove air cleaner outlet duct retaining wingnut. Loosen air cleaner outlet duct-to-MAF sensor clamp. Remove air cleaner outlet duct.
  2. Disconnect accelerator control cable from throttle shaft and bracket. Disconnect cruise control cable from throttle shaft and bracket (if equipped). Label and disconnect vacuum hose(s) for installation reference.
  3. Disconnect harness connectors from Throttle Position (TP) sensor, Idle Air Control (IAC) valve and fuel meter body assembly. See Figure. Disconnect A/C compressor clutch and A/C high pressure cut-off switch harness connectors (if equipped).
  4. Disconnect Manifold Absolute Pressure (MAP) sensor and EVAP canister purge solenoid valve harness connectors. See Figure.
  5. Remove engine wiring harness clip from accelerator control cable bracket. Remove accelerator control cable bracket retaining stud and nuts. Remove accelerator control cable bracket. See Figure.
  6. Remove 2 accelerator control cable routing bracket-to-throttle body retaining nuts. See Figure. Position accelerator control cable routing bracket aside with cables attached. Remove PCV valve hose assembly from intake manifold and valve cover.
  7. Remove nut retaining engine wiring harness bracket to intake manifold stud at left rear corner of engine. See Figure. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Disconnect fuel lines at fuel meter body assembly.
  8. Disconnect EVAP canister purge solenoid pipe at the EVAP canister purge solenoid and secure aside. Disconnect EVAP canister purge solenoid electrical connector. Remove nut retaining engine wiring harness bracket to intake manifold stud near EVAP canister purge solenoid on right side of engine. See Figure.
  9. Remove engine wiring harness bracket from intake manifold mounting stud. Remove EVAP canister purge solenoid mounting nuts. Remove EVAP canister purge solenoid from intake manifold mounting studs. Remove upper intake manifold retaining studs and upper intake manifold. Remove upper intake manifold gasket and discard.
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