Thanks for all suggestions. I wish I had a good scanner perhapps it might
tell me something. We just bought a Matco determinator on Ebay cheap and
plan to also buy a better scanner in the future. I will try the Matco and
see if anything comes up but since I have not gotten any warning lights I
kind of doubt it.
----- Original Message -----
From: "Rick Barnes" <barnesrv@attbi.com>
To: <dakota-truck@dakota-truck.net>
Sent: Sunday, December 08, 2002 9:42 PM
Subject: DML: RE: severe detonation problem
>
> I would suggest an injector cleaning that a one time shot of Techron
> cannot cure, a dirty IAT, and possibly and weak O2 sensor. Just my 2
> cents.
> Rascal
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Jim Miller
> WB5OXQ
> Sent: Sunday, December 08, 2002 9:20 AM
> To: dakota-truck@dakota-truck.net
> 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.
>
>
>
>
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