Jan Olsson Posted August 7, 2009 Report Share Posted August 7, 2009 Well to be honest you'll have to agree that the Caddies are "simple" compared to any other luxury car? At least we can pin-point your problem to a leak somewhere around your fuel rail. Missing o-rings, cracked fuel rail, leaking injector or FPR. Any leaks there will be drawn in to your engine. The warm starting problem and rough running both indicates (and verifies) your leak... Link to comment Share on other sites More sharing options...
leenorthstar Posted August 8, 2009 Report Share Posted August 8, 2009 Picture of 93 Nortstar Intake Manifold and Fuel Rail 1. Disconnect the negative battery cable. 2. Disconnect the number 1 and 2 fuel pump relays. 3. Properly relieve the fuel system pressure. 4. Remove the intake manifold top cover assembly. 5. Disconnect the intake manifold electrical connectors. 6. Remove the fuel rail assembly with the injectors intact from the intake manifold. 7. Separate the fuel injector from the fuel rail. NOTE: Wrap a shop cloth around the fuel lines to collect that leaks when disconnecting the fuel lines. Remove the O-ring seals from the injectors and discard. To install: 1. Install new injector O-rings. Lubricate lightly with engine oil. 2. Connect the injector(s) to the fuel rail assembly. 3. Carefully, install the fuel rail assembly to the intake manifold. 4. Install the intake manifold cover and tighten the bolts in proper sequence to 106 inch lbs. (12 Nm). 5. Connect the negative battery cable. 6. Start the engine and check for fuel leaks. thank you for the intakemanifold diagram very nice pic . Link to comment Share on other sites More sharing options...
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