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Diagnostic Tools

To properly test throttle body fuel injection system, service technician must have the following equipment available:

Digital volt-ohmmeter (DVOM) or volt-ohmmeter with minimum input impedance of one megaohm.
12-volt test light, jumper wires and probes.
Hand vacuum pump with gauge.
Ignition timing light.

Fig 1: Jeep/Renix Fuel Injection Diagnostic Connectors

Courtesy of AMERICAN MOTORS/JEEP CORP.