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Spark Plug Diagnosis (I can't remember where I found this, but I didn't create it) IF THE IMAGE IS TOO SMALL, click it. The inside back cover of any Haynes manual is another source for this info.  5.8L MotorCraft SP-415, SP-5015.0L MotorCraft SP-450, SP-5024.9L MotorCraft SP-435Spark plug & coil wires should measure ~7KOhm/foot from the terminal inside the distributor cap to the terminal in the boot that slips over the spark plug.  Before buying cheap aftermarket parts, check for coupons & service offers from Ford. See also:  .  .  .  .  .  .  |
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![plugdiagnosis.jpg Spark Plug Diagnosis (I can't remember where I found this, but I didn't create it)
IF THE IMAGE IS TOO SMALL, click it.
The inside back cover of any Haynes manual is another source for this info.
[url=https://www.supermotors.net/registry/media/449785][img]https://www.supermotors.net/getfile/449785/thumbnail/hayneses.jpg[/img][/url]
5.8L [url=https://www.amazon.com/dp/B0065UN1P0/]MotorCraft SP-415[/url], [url=https://www.amazon.com/dp/B001088OIQ/]SP-501[/url]
5.0L [url=https://www.amazon.com//dp/B0019I9WDS/]MotorCraft SP-450[/url], [url=https://www.amazon.com/dp/B001088OJU/]SP-502[/url]
4.9L [url=https://www.amazon.com/dp/B000BYGJ00/r]MotorCraft SP-435[/url]
Spark plug & coil wires should measure ~7KOhm/foot from the terminal inside the distributor cap to the terminal in the boot that slips over the spark plug.
[url=https://www.supermotors.net/registry/media/919936][img]https://www.supermotors.net/getfile/919936/thumbnail/plugwireresistance.jpg[/img][/url]
Before buying cheap aftermarket parts, check for [url=http://owner.ford.com/servlet/ContentServer?pagename=Owner/Page/ServiceCouponsPage]coupons & service offers from Ford[/url].
See also:
[url=https://www.supermotors.net/registry/media/830768][img]https://www.supermotors.net/getfile/830768/thumbnail/sparkplugdiag.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/833750][img]https://www.supermotors.net/getfile/833750/thumbnail/distributor9296.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/833749][img]https://www.supermotors.net/getfile/833749/thumbnail/distributor8791.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/762729][img]https://www.supermotors.net/getfile/762729/thumbnail/firingorderi6.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/470416][img]https://www.supermotors.net/getfile/470416/thumbnail/sparkwireroute94up_5l.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/470415][img]https://www.supermotors.net/getfile/470415/thumbnail/sparkwireroute8793_5l.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/771462][img]https://www.supermotors.net/getfile/771462/thumbnail/sparkplug8.jpg[/img][/url]](https://www.supermotors.net/getfile/1168561/fullsize/plugdiagnosis.jpg)