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Old 04-02-2010, 04:30 AM   #1
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2000 4.0 auto. Spark plugs

Need to change the plugs on my tj any ideas or should i stick with the originals.

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Old 04-02-2010, 05:06 AM   #2
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APP985 double tipped. This is the part number. Use it it will last you 100k miles. Atleast I think? Its either you need the double tip with the 4.0L or its double tipped for the rotorless years...cant remember = \

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Old 04-02-2010, 07:14 AM   #3
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Quote:
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APP985 double tipped. This is the part number. Use it it will last you 100k miles. Atleast I think? Its either you need the double tip with the 4.0L or its double tipped for the rotorless years...cant remember = \
Autolite APP985 double tipped work great for the distributor-less engines and will last a looooong time... not sure what's recommended for the engines with distributors. Either single tipped or might even be the standard plugs. Also, Bosch plugs are not recommended at all...they don't usually run worth a crap in the 4.0's.
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Old 04-02-2010, 07:21 AM   #4
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Thanks for the help mine is the distributor less and i will give the autolites a try
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Old 04-02-2010, 09:30 AM   #5
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The OE plug is a good replacement.
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Old 04-02-2010, 11:39 AM   #6
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Originally Posted by ebeale View Post
Thanks for the help mine is the distributor less and i will give the autolites a try
Good decision, they'll last 100K miles. Make sure they give you APP985 and not AP985. AP985 won't run right in a distributorless 4.0L engine. If they don't have the Autolite APP985, the Champion 7034 is very similar to the APP985 and will work just as well.
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Old 04-02-2010, 02:07 PM   #7
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I also have a 2000 auto 4.0. I could not find anyone who had the Autolite plugs in stock so I installed the Champion 7034 and am very happy with them.

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