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no spark

Old Nov 3, 2009 | 04:30 PM
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DHFHades's Avatar
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Year: 1990
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Engine: 4.0
Default no spark

well, as the title states, I have figured out that my truck is getting no spark. I was just wondering if there is anything besides a bad coil that could cause this, and how I can check for it, I searched for threads but got nothing useful, any help is apreiciated...
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Old Nov 3, 2009 | 04:37 PM
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what year is it and what motor does it have?? there's several other things that can cause no spark, but I need some more info about the truck
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Old Nov 3, 2009 | 06:03 PM
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Originally Posted by 1992laredo4x4
what year is it and what motor does it have?? there's several other things that can cause no spark, but I need some more info about the truck
1990 and it has a 4.0L
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Old Nov 3, 2009 | 07:46 PM
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also, how many other things can cause no spark? hopefully the list is short...
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Old Nov 3, 2009 | 07:53 PM
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Have you checked to see if gettin a spark out of coil? if its sparkin of the coil then i would check distributor, Plug Wires, Plugs. if no spark from coil could be CPS. im sure there is other stuff i not said but im not the best as far as ignition stuff goes
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Old Nov 3, 2009 | 08:02 PM
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Originally Posted by Wyte
Have you checked to see if gettin a spark out of coil? if its sparkin of the coil then i would check distributor, Plug Wires, Plugs. if no spark from coil could be CPS. im sure there is other stuff i not said but im not the best as far as ignition stuff goes
yes I checked, and no spark from coil...I was just reading another thread about not starting too...hopefully that will shed some light on things
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Old Nov 3, 2009 | 09:16 PM
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the most common problem is the crank position sensor. but it could also be a pick up coil or bad ecm if no spark from coil. the easiest way I know of checking the coil is to use a test light and the + wire on the coil should have constant power and the - side, the test light should blink when turning the engine over. if it blinks, then the coil is bad...if it doesnt, then the problem will be something else. I think some part stores can check the crank sensor and pick up coil. the crank sensor aint too bad to replace, but I have never replaced a pick up coil yet......
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Old Nov 3, 2009 | 09:53 PM
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Originally Posted by 1992laredo4x4
the most common problem is the crank position sensor. but it could also be a pick up coil or bad ecm if no spark from coil. the easiest way I know of checking the coil is to use a test light and the + wire on the coil should have constant power and the - side, the test light should blink when turning the engine over. if it blinks, then the coil is bad...if it doesnt, then the problem will be something else. I think some part stores can check the crank sensor and pick up coil. the crank sensor aint too bad to replace, but I have never replaced a pick up coil yet......
cool, I will start checking things tommorow...thnx for the help
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