1999 Ford Crown Victoria ignition coils

1999 FORD CROWN VICTORIA
175,000 MILES • V8 • 2WD • AUTOMATIC
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CRANDADDY
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I have a 1999 ford crown vic interceptor. The ignition coils keep going bad. Is there something that can cause this?
I keep replacing coils but that gets expensive.
Mar 10, 2010 at 11:56 AM
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DOCFIXIT
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All eight coils or just certain one?
Mar 10, 2010 at 12:43 PM
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CRANDADDY
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Its all eight coils. I have replaced several and dont remember which ones. Right now 2, 6 and 7 are missing.

Thanks
Mar 10, 2010 at 12:48 PM
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DOCFIXIT
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How many miles on plugs? Motorcraft AWSF-32PP or equivelant?
Mar 10, 2010 at 1:04 PM
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CRANDADDY
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probably 20,000 or so on plugs?
Not sure on brand. Should I just try new plugs?
Mar 10, 2010 at 1:10 PM
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DOCFIXIT
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Could be the problem if plugs wrong type or gap incorrect would cause coils to heat up. Also good to ues Dielectric jell on plug contact.
Mar 10, 2010 at 1:21 PM
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CRANDADDY
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Is there something that regulates the voltage sent to the coil? Like 12 volts when starting the car and down to 6 volts when running? Perhaps stays at 12 volts for some reason and damages the coils?
Mar 10, 2010 at 1:33 PM
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DOCFIXIT
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Nope they get 12 all the time and ECM grounds to fire. Using Motorcraft or aftermarket coils?
Mar 10, 2010 at 1:58 PM
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CRANDADDY
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I have replaced with aftermarket. I have been told that aftermarket are made to ford specs?
Mar 10, 2010 at 2:20 PM
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CRANDADDY
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Do think the aftermarket are OK to use? Some say definitely not.

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Mar 12, 2010 at 1:01 PM
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DOCFIXIT
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I would use OEM with all the stuff coming out of China you never know what you get
Mar 12, 2010 at 1:13 PM