03 350z no spark issue - Nissan 350Z Forum, Nissan 370Z Tech Forums
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post #1 of 8 (permalink) Old 05-27-2016, 08:19 AM Thread Starter
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03 350z no spark issue

hey I'm having a no start issue that i cannot figure out. Everything started after I changed two exhaust lifters to fix a ticking noise. A list of parts that were replaced during this job include: timing kit (chains, guides and tensioners), water pump, all new gaskets, both belts, external oil cooler, camshaft sensors and crankshaft sensor. After putting everything back together the car cranks over but doesn't start. I checked and I have injector pulse but no spark from any of the coil packs. i checked for voltage from the battery to each of the coil packs and its a full 12volts. Also the coils have good grounds and .4v coming from the computer. I have also taken the timing off and re checked it twice so i know the timing is not the issue. does anyone know of any engine sensors that would disable spark to the coils. The only one i can think of is the crank sensor, which has been replaced once with one from autozone then replaced with an OE one. all the wires going from the crank sensor to the ECU have .3ohms of resistance and no opens or shorts to ground. Does anyone have any ideas or thoughts on possible problems. also a possible test to see if the ECU is still good.
any help would be greatly appreciated

Thanks bunches


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post #2 of 8 (permalink) Old 05-27-2016, 11:02 AM
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Are there any ECM or BCM codes currently showing?
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post #3 of 8 (permalink) Old 05-27-2016, 11:36 AM Thread Starter
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Are there any ECM or BCM codes currently showing?


No codes at all


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post #4 of 8 (permalink) Old 05-27-2016, 12:29 PM
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The only testing mechanism I'm aware of the ECM is using a CONSULT III unit. And unless you've got one of those, you may as well spend the diagnostic fee (usually an hour of shop time) to have a trained technician examine the entire 'no-spark' issue.


Whatever happens, be sure to update this thread and let us know what the issue(s) were!
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post #5 of 8 (permalink) Old 05-27-2016, 08:57 PM Thread Starter
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I've tried the verdict scanner and all the data I'm pulling up reads correct. I'm getting rpm data so the crank sensor is reading and the fuel injectors are firing so the computer is getting cam signal. I don't want to have to take it to the dealership because that's 100miles away and I don't have a flat bed trailer to tow it. Do they make a test pigtail for the computer to test wires while the computer is installed?


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post #6 of 8 (permalink) Old 05-30-2016, 10:51 AM
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Do they make a test pigtail for the computer to test wires while the computer is installed?
You may want to contact UpRev and see if they have a test process with their OSIRIS or CIPHER programs. They use the OBD II port to access the ECM/BCM/ABS systems.
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post #7 of 8 (permalink) Old 06-07-2016, 11:48 AM Thread Starter
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Mini update it's for sure not the key, just had that checked out. I will definitely check out UpRev see what they have to say


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post #8 of 8 (permalink) Old 10-16-2016, 12:58 PM
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It's been four long months since this thread got any updates. What happened? Give us a detailed solution to your problem, ladi...
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