I believe your experiencing detonation. Try going to a higher octane gas
and see if it quits.
Somewhere in my "pea brain", I remember that in late September gas companies
switch to the 'cheaper formula" and that could be causing it. Also, the 4.7L
doesn't have a knock sensor. Recently, I was towing my race car with my
DAK and got some 87 Mobil gas in N.C. My 4.7L would ever-so-slightly rattle
on the hills at 1/2 throttle, the sound would go away at WOT. On the next
fillup in VA, the rattle disappeared. Of course, I'm hauling a 3500 lb car
on a dual wheel trailer with about 500 lbs of tools/tires, with me and my
wife the truck. (and I still get 16 MPG) ...
----- Original Message -----
From: "Mike St. John" <mike.stjohn@rcmt.com>
To: <dakota-truck@buffnet.net>
Sent: Monday, October 15, 2001 1:46 PM
Subject: DML: 00 dak 4.7 engine problem
> I have a 00 dak quad cab, 25,000 miles.... sometimes under a load -
> going up hills etc... the engine rattles, kinda like the rockers ,
> however oil have been change every 3,500 , mobil 1 is my oil of choice.
> anyone else experience this problem or have any insight into it.
>
>
> Thanks
>
> msj
>
>
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