Don't all R/Ts require 92 octane or better?
Jim Miller WB5OXQ wrote:
> Plugs are new. Plugs that came out having 30k on them looked good. I fear
> a lean condition and I am running mid grade now.
> ----- Original Message -----
> From: "Terrible Tom" <SilverEightynine@earthlink.net>
> To: <dakota-truck-moderator@bent.twistedbits.net>
> Sent: Sunday, December 08, 2002 11:24 PM
> Subject: Re: DML: Re: severe detonation problem
>
>
>
>>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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