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Jeep Master
6,826 Answers
- Posted on Aug 17, 2010
Re: Where is the carb on a jeep grand cherokee 1993 4.0...
There is no carburetor on any of the 6 cylinder or 8 cylinder Jeep Grand Cherokees. They have Fuel Injection and a throttle body which looks like a carburetor scaled down.
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Instructions on how to remove and replace the throttle body follow:
Throttle Body
REMOVAL & INSTALLATION
- Disconnect the negative battery cable.
- Remove the vacuum hoses from upper bonnet, unfasten the retaining clips and remove the upper bonnet assembly.
- Remove the lower bonnet retaining bolts and lower bonnet.
- Remove the throttle cable and the return spring.
- Disengage the wire harness connector from the injector.
- Disengage the wire harness connector from the WOT switch, ISA motor and TPS.
- Disconnect the fuel supply and return lines from the throttle body.
- Tag and disengage the vacuum hoses from the throttle body assembly.
- Disengage the potentiometer wire connector.
- Loosen throttle body retaining bolts and remove throttle body assembly from the intake manifold.
To install:
- Clean the intake manifold and throttle body mating surfaces of old gasket material.
- Install a new gasket and the throttle body assembly. Tighten the mounting bolts to 16 ft. lbs. (21 Nm).
- Engage the potentiometer wire connector.
- Engage the vacuum hoses to the throttle body.
- Engage the fuel lines to the throttle body.
- Engage the WOT switch, ISA motor, TPS, and injector electrical connections.
- Install the return spring and throttle cable.
- Install the lower bonnet and fasten the retainers.
- Install the upper bonnet assembly, retaining clips and vacuum hoses.
- Connect the negative battery cable.
- Start the vehicle and check for fuel leaks.
Fig. 1: Exploded view of the throttle body and related components
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