I'm anxious to see what your problem turns out to be.
My workdak does the same thing,but it's more of an
"occasionally runs good,normally runs weak" thing at
this point. Does driving over a rutted or bumpy road
affect YOUR problem at all?
Steve P.
--- WiLieR <waffle787@gmail.com> wrote:
>
> It has had the compression test done, the heads were
> off abot 2k ago
> to check them (same time o2s were replaced) and it
> got its third
> plenum gasket then. The gasket looked fine, but I
> decided to replace
> it anyway. I have capped off every vacuum port and
> it will still
> throw fits. I have back probed every sensor
> possible with an analog
> volt meter, a dvm and an oscilliscope. Still no
> help from any of the
> readings. I have checked the resistance of every
> circuit in the
> wiring harness with no luck there either. I am out
> of ideas and hope
> the obd-II software can help me out some.
>
> WiLieR
>
>
>
> On 2/21/08, Bernd D. Ratsch <bernd@dodgetrucks.org>
> wrote:
> >
> > Have you done a running compression check or
> cylinder leak-down test yet?
> > At 157K miles...i'd be checking for either a
> leaking plenum and/or cracked
> > head (very common on these engines at higher
> mileage).
> >
> > - Bernd
> >
> > -----Original Message-----
> > From: WiLieR [mailto:waffle787@gmail.com]
> > Sent: Thursday, February 21, 2008 9:07 PM
> > To: dakota-truck@dakota-truck.net
> > Subject: DML: OBD-II Software
> >
> >
> > I'm in the market for some OBD-II software to use
> on my laptop. I
> > want it to be able to log sensor readings (as many
> as possible) and
> > maybe create graphs of these readings. I have an
> intermittent stumble
> > on my dak that I can't track down for the life of
> me. It has been a
> > four year on going project to track down the
> source but I haven't been
> > able to find it. I have replaced every sensor on
> the thing and I
> > still get a random stumble. If it was carbed I
> would say it is
> > flooding out because it stumbles and runs like
> crap, might backfire a
> > couple of time either through the exhaust or the
> intake but if I floor
> > it and run it through first gear (always does it
> at idle while in
> > gear) to "blow it out" then it does just fine. I
> have checked the
> > timing and it is spot on. I have monitored the
> fuel pressure while it
> > is running normal and while stumbling; it always
> stays at a constant
> > 49-50 psi. I don't have any vacuum leaks and my
> trans is acting
> > normal.
> >
> > So my final resort is to buy some OBD-II software
> and log the sensor
> > readings hoping to interpret the sensor data to
> determine exactly what
> > is going on. Before it is asked, I have done a
> tune up, the O2
> > sensors are only 2,000 miles old (I know Bernd
> would have asked about
> > them ;D ) and I have checked and double checked
> every ground, tried a
> > different pcm out of a known normal running dak
> and even swapped
> > distributors thinking maybe the bushings in it
> were going bad. The
> > dak is a 96 3.9 auto with 157k on the clock.
> >
> > WiLieR
> >
> >
> >
> >
>
> --
> Sent from Gmail for mobile | mobile.google.com
>
>
2007 Dodge Ram 1500 QC Black 4X4 Sport w/Hemi
2003 Dodge Dakota Sport CC Red 4X2 Sport w/3.9 and 42RE (Work truck,driven the most often)
2000 Jeep Grand Cherokee Laredo Silver 4X4 w/4.0 and 42RE
____________________________________________________________________________________
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
This archive was generated by hypermail 2b29 : Sun Mar 02 2008 - 02:10:11 EST