NO SPARK

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grnt300zx - 26 Jun 2006 02:15 GMT

i bought a car that had the valves bent, i put new heads on it and put the
engine back in the car. After hooking everything up now i am getting no
spark at all in my coils. What should i check and what parts run the
ignition. I have another 300zx that runs fine, i took the power transitor
and the crank angle sensor off that 300zx and put them on the other one
just to see if they were bad and still nothing. It cranks but no fire at
all. PLEASE HELP

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Steve T - 27 Jun 2006 08:03 GMT

> i bought a car that had the valves bent, i put new heads on it and put the
> engine back in the car. After hooking everything up now i am getting no
[quoted text clipped - 3 lines]
> just to see if they were bad and still nothing. It cranks but no fire at
> all. PLEASE HELP

How about injectors? do they fire? Also helps if you supply the year, they
made 300ZX's from 84-96

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Steve

http://www.atlantaracing.com

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grnt300zx - 27 Jun 2006 22:35 GMT

sorry i thought about all that after i posted the first one. We though it
was getting fuel but after finding out how to test the crankangle
sensor,(by spinning the crank angle sensor with your hand) there is no
spark and the fuel injectors are not working. The crankangle sensor and
power transistor do work if i put them on the other car. It is a 1990,
automatic, n/a.

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Steve T - 28 Jun 2006 06:39 GMT

> sorry i thought about all that after i posted the first one. We though it
> was getting fuel but after finding out how to test the crankangle
> sensor,(by spinning the crank angle sensor with your hand) there is no
> spark and the fuel injectors are not working. The crankangle sensor and
> power transistor do work if i put them on the other car.

I'd check to see if the ECU is powering up (leds on the box or check with a
code tester). The crank angle sensor should fire the injectors, trigger the
fuel pump and spark when spun, so if none of these are happening and the
CAS is a known good one, you got a problem with the ECU, it's not being
powered up (Bad EFI relay or fuseable links etc) or wiring between the CAS
and the ECU.

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Steve

http://www.atlantaracing.com

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