Coil and injector troubleshooting

Asked by Dec 30, 2008 at 10:45 PM about the Infiniti J30

Question type: Maintenance & Repair

what should the coil and injector read outs be when testing with an ohm/volt meter.The j30 has a miss and the #5 cylinder doesnt get worse when coil wires removed when running .

1 Answer


300zx owner- the j30 & the VG30DE are pretty much the same engines. The injector(s) would crap out on you BEFORE the coilpacks will... Anyway, if you've swapped around the "suspected" coilpack & there wasn't a temporary change in that suspected area, then, its not the coilpack, its the injector... a "good" injector should ohm out between 10-14 ohms. Anything lower / higher than that,,, its a goner.... BUT, make sure there's no green looking crap on the injector leads as well as the connector itself. If there is, you can sneak 1 of the lady of the house's emory boards and gently file/scrap that crap off,,, w/ a little help from an electronics cleaner of course... apply a fresh coat of diaelectric grease into the connector and see what happens. GOOD LUCK!!!

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