ngk spark plugs, part # 4644 (BKR7E) and gap them to .028 $1.89 a piece
make sure your cam angle sensor is getting power and ground, gound = black wire, power will either be solid white, or black with a white stripe. it should have ignition 12 volts and this wire should have continuity with the black and white stripe that goes to the the maf.
you can take out your cam angle sensor from the head. plug it back in, turn the key ON, then spin the cam angle sensor and you should hear your fuel pump run, your injectors clicking, and you should be getting ground pulses to your coil pack's signal wires (pink) labeled - on the coil packs.
there's only 5 things that could be your problem for a no spark scenario on this car.
1. cam angle sensor
2. ignitor aka PTU (power transisting unit, aka ignition control module)
3. ecu
4. coil packs
5. wiring
that's it.
gl man, hope you find the problem,
Dave
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 RB25 280z GT30/76R 441hp/381tq 11.9@125
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