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/
>
>
>
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:48:13 EST