Aerostar Ford Aerostar

No Spark 94

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Old 03-30-2010, 01:38 PM
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No Spark 94

I just replace the ignition coil, and checked for spark with the wire off, and there was none, until I stopped turning the ignition, then there was a zap? So I was wondering if anyone had an idea as to why there is no spark.
 
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Old 03-30-2010, 04:23 PM
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What kind of engine? What year?

In general, that sounds like a wiring problem. The power to the coil should be on at all times; during cranking, it should see full 12V from the battery, and when not cranking but key on, it should see about 9V, with the power going through a resistor. Most other power like accessories (except lights) should turn off during cranking. So if you see a spark just as you stop cranking, it means either the direct connection to the coil is broken, or you are trying to power it from an accessory line.
 
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Old 03-30-2010, 05:33 PM
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Remove the steering column shrouds. Check the electrical part of the ign switch that it hasnt separated or that the plug isnt burnt. It is held together by four claw tabs. Use a small vice grips to remove the anti tamper bolts.
 




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