Try this: http://www.dodgeram.com/technical/TSB/18_48_98.htm
it worked on my truck...
>I did this on my '95 which was experiencing pinging at WOT. It helped but
>did not eliminate the problem that I have had since I bought the truck. I
>now have 100K miles on it and if I get on it real hard I still get the
>pinging. This after installing a 180degree T-stat and the cooler plugs and
>regularly using octane boost. All measures reduced the problem but did not
>eliminate it. I just learned to drive a little differently to avoid ping,
>like open throttle 7/8 of the way instead of totally. I don't race it so
>97% of the time I have no problem (you may be different though). But don't
>just go by my experience. Any one or both of these could work fine for you.
>I don't have the plug numbers on hand. I just went into the auto parts
>store and asked for the next heat range cooler plug (I am running
>Autolites). Perhaps I should try different brands of plugs to see if I find
>one that works, but that sounds real empirical, not to mention expensive
in
>terms of money and time.
>
>Bob K.
>-----Original Message-----
>From: Smith, Don W, SITS <donwsmith@att.com>
>To: 'dakota-truck@buffnet.net' <dakota-truck@buffnet.net>
>Date: Thursday, July 29, 1999 2:59 PM
>Subject: DML: Pinging Dakota fixes
>
>
>>I have read an article that installing a "cooler" spark plug helps the
>>annoying ping problem in 318 Dakotas. Does anyone have the part number for
>>this plug?
>>Don S.
>>99 Dakota 4X4 pinger
>>
>
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