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Can an ignition coil half die? 87 4.0 renix

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Old Dec 1, 2010 | 03:56 PM
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Year: 1987
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Default Can an ignition coil half die? 87 4.0 renix

I've got good voltage to it and a good ground as well. The spark seems really weak. The car is super easy to flood and once it is it wont start until I unhook the pump and crank it for about 3-4 minutes and let it burn up the excess fuel. I was wondering if these units can partially go out or if they are more of a good/bad type part? I just replaced the crankshaft position sensor and that didn't help. Also, the plugs, wires, cap and rotor are all new.
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Old Dec 1, 2010 | 04:07 PM
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coil will loose power creating weak spark
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Old Dec 1, 2010 | 04:16 PM
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Originally Posted by freegdr
coil will loose power creating weak spark

Is there a way to test the coil to see if it has lost power? I've searched for that but can't find anything that specifically test the coil output power.
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Old Dec 1, 2010 | 04:21 PM
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yea weak spark
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Old Dec 1, 2010 | 04:22 PM
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did you just buy the xj or have you hadit for along time because renix take longer to start
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Old Dec 1, 2010 | 04:29 PM
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x2 renix era take about 5 cranks or so to start.But it is possible for the coil to be weak from age/miles
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Old Dec 2, 2010 | 10:26 AM
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What's weird about it is that if I crank it for a few seconds without it starting and then immediately crank it again it will start up in a second just like any other car.This is something that the truck has done since the day I bought it.(About 4 months ago) The new problem is entirely different in that it wont start up at all until all the excess fuel is burned off. At this point I think there are only two routes left for me. Sell it/trade it and get a newer, non-renix XJ or completely replace the engine harness and maybe a couple more parts. Some moron had it at some point in it's life and decided to hack up the harness for no good reason.
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