1999 Chevrolet Blazer Fuel Injectors Removal & Installation
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See Figures 1 and 2 1. Disconnect the negative battery cable. 2. Relieve the fuel system pressure. Refer to the fuel system relief procedure in this section. 3. Unplug the fuel meter body electrical connection and the fuel feed and return hoses from the engine fuel pipes. 4. Remove the upper intake manifold assembly. 5. Tag and remove the poppet nozzle out of the casting socket. 6. Remove the fuel meter body by releasing the locktabs. Each injector is calibrated. When replacing the fuel injectors, be sure to replace it with the correct injector. 7. Disassemble the lower hold-down plate and nuts. 8. While pulling the poppet nozzle tube downward, push with a small screwdriver down between the injector terminals and remove the injectors. Fig. Fig. 2: Exploded view of the fuel injector assembly To install: 9. Lubricate the new injector O-rings with clean engine oil, then install the O-rings on the injector assembly.
See Figures 1 and 2 1. Disconnect the negative battery cable. 2. Relieve the fuel system pressure. Refer to the fuel system relief procedure in this section. 3. Unplug the fuel meter body electrical connection and the fuel feed and return hoses from the engine fuel pipes. 4. Remove the upper intake manifold assembly. 5. Tag and remove the poppet nozzle out of the casting socket. 6. Remove the fuel meter body by releasing the locktabs. Each injector is calibrated. When replacing the fuel injectors, be sure to replace it with the correct injector. 7. Disassemble the lower hold-down plate and nuts. 8. While pulling the poppet nozzle tube downward, push with a small screwdriver down between the injector terminals and remove the injectors. Fig. Fig. 2: Exploded view of the fuel injector assembly To install: 9. Lubricate the new injector O-rings with clean engine oil, then install the O-rings on the injector assembly.
10. Assenble the CSFI injector assembly
into the fuel meter body injector socket. 11. Assemble the lower
hold-down plate and nuts. Tighten the nuts to 27 inch lbs. (3 Nm). 12.
Install the fuel meter body assembly into the intake manifold
and tighten the fuel meter bracket retainer bolts to 88 inch. lbs. (10
Nm). CAUTION To reduce the risk of fire or injury ensure that the
poppet nozzles are properly seated and locked in their casting sockets
13. Install the fuel meter body into the bracket and lock all the tabs
in place. 14. Install the poppet nozzles into the casting sockets. 15.
Engage the electrical connections and install new o-ring seals on the
fuel return and feed hoses. 16. Install the fuel feed and return hoses
and tighten the fuel pipe nuts to 22 ft. lbs. (30 Nm). 17. Connect the
negative battery cable. 18. Turn the ignition ON for 2 seconds and then
turn it OFF for 10 seconds. Again turn the ignition ON and check for
leaks. 19. Install the upper intake manifold.
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