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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 11-23-2007, 07:58 AM   #1
unicoladron
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ok so you said cylinder # 3 has spark. so you know the coilpack, wiring, and pug is good for cyl # 3. now it is a process of elimination. try this:

1. take the coilpack from cyl # 3 and plug it into cyl # 1 and test for spark. repeat the same steps for cyl # 2 and 4. this will determine if your ignitor is working SOMEWHAT properly. so if you do this, and you see that you have spark on cyl's # 1, 2, and 4 using the coilpack that is in good working order, your ignitor is fine, and perhaps your coilpacks, and/or coilpack wiring have gone bad. SO, if this test shows you have spark on ALL packs, perhaps your timing is off and you can follow the CAS timing procedure found on frsport.com and heavythrottle.com (aka srswap.com). also, make sure the wiring for your CAS is okay. the CAS tells the coils when to fire, so again, make sure your CAS wiring is ok and the CAS itself is alright.

EDIT: oh shit, i missed the post where you said it wasn't even really cranking. yeah, make sure your battery is good, make sure your battery terminals have a good connection, make sure your grounds are ok (clean where grounds contact chassis/engine), and make sure your lower engine harness is not shorting out anywhere.
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