It's one of those weird issues where you won't find anything obvious. It
took three of us (myself, STAR, and a field engineer) to look at all of the
datalog and decipher some of Chryslers sensor values.
- Bernd
-----Original Message-----
From: Rick Barnes [mailto:rsb7424@gmail.com]
Sent: Tuesday, June 24, 2008 12:47 PM
To: dakota-truck@dakota-truck.net
Subject: Re: DML: P0300 - Update
that is too weird...its amazing that you were able to figure that one out.
Rascal
On Mon, Jun 23, 2008 at 3:52 PM, Bernd D. Ratsch <bernd@dodgetrucks.org>
wrote:
>
> After some extensive data-logging, found the problem. The TQ
> Converter wasn't completely engaging in Lock-up mode - causing a very
> mild shudder that only presented itself at 40mph/1200rpm. It was
> approximately a 30rpm fluctuation in turbine speed which caused the
> crankshaft rotation to "freak out" when in that range (actually found
> the engine RPM dropping down to 300rpm - reported by the crank sensor -
causing the P0300).
>
> So...replaced the TQ converter and no more misfire code.
>
> For those who don't know what a "MisFire" means: It's an unexpected
> change in crankshaft rotation - anything that changes the crankshaft
> rotation can cause a misfire code. It's not just related to the spark
> plugs or ignition coil(s).
>
> - Bernd
>
>
>
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