9 ELECTRONIC DIAGNOSTIC TUNE-UP AND TESTING APPARATUS FOR AUTOMOBILES, NAMELY, PORTABLE DIGITAL MULTI-TESTERS AND ANALYZERS, COMPRISING TACHOMETER, DWELL TACHOMETER, VOLTMETER, AMMETER, AND OHMMETER, WITH OR WITHOUT PRINTER, SCOPE/ANALYZER INTERFACES, AMP SENSORS, DC POWER SUPPLIES, CIRCUIT POINT TESTERS, BATTERY SIDE POST AND DISTRIBUTOR ADAPTERS, VACUUM/PRESSURE TESTERS, COMPRESSION TESTERS AND REMOTE STARTER SWITCHES