All -
I just found this site ... Thanks, Jon!
I've got a '93 Dakota with the 3.9L that pings (ie, pre-ignition)like crazy if
fed anything under 92 octane. It's got 54K miles on it and was driven gently and
fed CHEAP gas for it's first 30K or so. I assume the pinging is due to carbon
deposits in the engine. Is this a correct assumption? Can a lean mixture
(from, say, dirty injectors) cause pinging?
Other than tearing the heads off and mining the pre-diamond deposits off of the pistons,
what can be done? I've tried a few of those "cleaners". They work for awhile, but
then the racket comes back.
Thanks
- Jim D.
Cincinnati, OH
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Please keep this in mind. Thank you! --Jaek (smit2204) and -Jon- (stei0302)
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