I would try burning premium grade and I would also replace the O2
sensors. If they have
gone bad - it very well could cause the rich conditions. How new are
your plugs? Might want to pull them to see if the electrodes are worn.
Running rich will cause a plug to wear out faster.
> -----Original Message-----
> From: Jim Miller WB5OXQ <wb5oxq@grandecom.net>
> To: dakota-truck@dakota-truck.net <dakota-truck@dakota-truck.net>
> Date: Sunday, December 08, 2002 3:56 PM
> Subject: DML: severe detonation problem
>
>
>
>>Just over the past 3 or 4 months my 99 R/T has developed a severe
>
> detonation
>
>>problem especially at full throttle but noticable even on the cruise
>
> control
>
>>pulling a slight incline. I have changed nothing that should cause the
>>problem over the past 4 years. the truck has 49k miles on it. I checked
>>inside the t'body to look into the manifold and it is very clean so I dont
>>suspect the belly pan gasket. I have tried techron fuel injector cleaner
>
> as
>
>>recommended by a local garage owner that specializes in tune ups and I am
>>running 89 octane fuel but that has not helped. I hesitate to take it to a
>>dealer because I am afraid all they know to do is retard the timing enough
>>to stop the knocking and I suspect that will take a big retard as bad as
>
> the
>
>>knock is. I know that will hurt mileage and performance a lot and since
>>timing is ecm controlled it should not have gotten out of adjustment. I
>>wonder if low fuel injector pressure could be the problem? I have no way
>>to check this. I do not believe there are any vacuum leaks either. I am open
>>for suggestions because right now I have to drive very gently to avoid
>>knocking. Any help would be greatly appreciated. I may have to make a trip to Pflugerivlle.
------------------------------------------------------------------------------------------ Terrible Tom
"It's a living thing... It breathes, it eats, ...and it hates..."
Silver '89 Reg Cab, V6, Auto, 8 footer, 4x2 Silver '89 Reg Cab, V6, Auto, 8 footer, 4x4 w plow - (aka Granpa)
AIM Screen name: SilverEightynine Yahoo Messenger: SilverEightynine
DML Profile URL: http://www.twistedbits.net/WWWProfile/dakota/LkxxVw49jp7dU/
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