300ZX (Z31) Forums Dedicated to 84-89 ZCars otherwize known as the Z31's

power transistor? no spark!

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Old Dec 20, 2008 | 11:00 PM
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Exclamation power transistor? no spark!

hello all.... so here is my problem i recently got this 88 300zx that had an engine fire, i have some experience working on them because this is the third 87-89 i have had, i have repaired any damaged electrical and the greater majority of the sensors i tried to start it and got it to crank but not turn over, after some work i have determined that the engine is getting fuel but no spark. I do not know where the problem is but here are the details: as far as i can determine the crank angle sensor is working the test i used was to turn is and listen if the injectors would fire and they did i also tried switching it out with an known working one and still nothing..... the coil is fine i tested it and i also tried switching it out with an known working one and still nothing... so far as the power transistor the original one i had i do believe didn't work properly because of the fact then when i would crank the car would get very HOT!! and would smoke i switched it out from one from a 85 and had the same problem i have checked the wiring several time and it is correct to the ecu. any help here would be nice thanks. O ya and if there is any way to by pass the stock ignition with some kind of after market one to fix the problem this would be much appreciated.
Old Dec 21, 2008 | 08:57 AM
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Hot + Smoke = Short Circuit
Old Dec 21, 2008 | 02:24 PM
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i would agree except i don't know where it would be: three wires one to ecu one to coil and one to ground....i checked and these are where everything is leading to as far as i know that is where they are suppose to lead and diagrams or links to check them would be nice. i am out of ideas
Old Dec 21, 2008 | 03:45 PM
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Some Great Reference Material...

The Factory Service Manual may have what you need to track down the problem.

Click This Link to obtain your very own copy (for free)...
Old Dec 21, 2008 | 05:18 PM
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thanks a bunch i will let you know what happens
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