Injectors Ohm Readings an Sparkplug color.

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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vape-one
Posts: 416
Joined: Wed Oct 29, 2008 6:01 pm
Car: 1990 300zx

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Left ohm Reading / Center ohm Reading / Right ohm Reading-----------.02 -----Nothing------ .02 middle*Stuck open I think

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.32-.33 --------7.75 -------------------------------------------------- Nothing--- High ohm --- Right plug*closed I think

I think because the middle injector is stuck open is why I have no power an have no fuel pressure... Also the reason plug is so black.. An the one on the right that is really clean I think it is stuck closed... That is if there is such a thing that will happen in the injectors...

I know that the ohm are supposed to be in between 12~14 but I didn't know what to set gauge at..But I just learned it's 200.. All the Injectors from my old Z read .02 exactly...

I also took each coil out an checked the spark against the engine an all were working..

*****---------I need to know what the Ohm is for Coil packs an what setting to put my ohm meter on... 20k an 2k is what I was using with Ohm meter..---- If ya all remember my old post I was having trouble with my ohm meter.. There was a bad connection in one or both of the red/black tongs..



If you Z fellas have any comments it sure would be helpful...



Modified by vape-one at 8:59 PM 1/31/2010
Modified by vape-one at 9:03 PM 1/31/2010


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Zwicked
Posts: 3133
Joined: Mon May 14, 2007 6:19 am
Car: 1990 300 ZX tt, 1990 240SX

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Are your injector connections clean? I think you may be getting false readings as they are all way out of spec, and by rights it shouldn't even run. Have you set your multimeter to the 200 ohm range? If you set it to any higher range, then you will get a reading of the decimal place moved left.The center plug on the top looks oil fouled and the others looks fuel fouled a bit. Should post some side closeups as they are hard to see.What brand and part number are those plugs by the way?

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vape-one
Posts: 416
Joined: Wed Oct 29, 2008 6:01 pm
Car: 1990 300zx

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My Multimeter has an issue.. I just now finally got it to even read... Connections are not perfectly clean but I did the reading like ten x's a inj. an I got same each time...Yea Zwicked I just now learned about the 200 setting thanks to your post.. I will work on getting pictures of plugs again.. Thank you..


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