I have the same problem...but I live in Mass. But we have very strict
emissions here too...maybe that does have something to do with it...
-----Original Message-----
From: Tony Mastres <mastres@id.ucsb.edu>
To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
Date: Wednesday, October 20, 1999 1:58 PM
Subject: Re: DML: Ping and Rattle problems
>>I have a '99 4x4 with a 3.9 V6 and 13,600 miles.
>>
>>Some time ago, it started "pinging" around 1600 RPM. Eventually, it also
>>pinged around
>>3000, then spread almost any RPM. It starts after about 20 minutes of
>>driving and only
>>pings while moving, never in neutral. The loudness has increased to
>>unbearable levels
>>(sounds like it's all gonna fall apart). I call it knocking or rattling
>>now.
>>
>I've had the exact same problem for about 6 months with no resolution. I
>have found that higher octane gas will reduce but not eliminate the
>problem. The oddest diagnosis was that something in the California
>emissions packacge was causing it. I really dont know enough about it to
>believe or discount this theory but I was wondering if this is a California
>problem moreso than other parts of the country?
>
>
>
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