Fuel filter would have to wait till Thanksgiving weekend. I can't drop the tank
in my apartment complex. Power seems to be lower than usual lately (forgot to
mention that before), this would point to a bad O2 sensor, correct?
As for the number of PCV valves, I don't know. Can someone check for me? I
don't know if the Haynes manual has that, and the FSM is at home.
Kenneth Eng wrote:
> Does the Magnum engines use 2 PCV valve?
>
> How about changing the fuel filter?
>
> -----Original Message-----
> From: Andy Levy [mailto:andylevy@yahoo.com]
> Sent: Friday, November 02, 2001 1:59 PM
> To: dakota-truck-moderator@bent.twistedbits.net
> Subject: Re: DML: Is my engine dying? (longish)
>
> WOW. The list never ceases to amaze me. Thanks to everyone who's posted so
> far. I was afraid my post last night was so long people would pass it by.
> I
> think my shopping list for tonight is:
>
> cap
> rotor
> plugs
> wires (have to mail-order)
> PCV valve
>
> Any other real cheap, easy stuff I can replace while I'm in there? What
> about
> the EGR valve (while we're throwing around 3-letter valve names)? May as
> well
> do all these "little" things while I'm at it. Now I get to use my shiny new
> FSM! More below:
>
> Bob Tom wrote:
>
> > The injectors do make a clicking sound when they open and close.
> > Under certain circumstances, the injectors will stop opening and
> > closing when decelerating.
> >
> > OE exhaust manifolds do not usually leak but will make a ticking
> > sound upon startup when engine is cold. If the leak isn't too large,
> > the ticking sound will disappear when the exhaust gases get hot
> > and the metal expands.
>
> I get it both hot and cold.
>
> >
> > >My gas mileage has also been poorer than I think it should be. I'm
> > >getting 13 MPG *at best* in town, and am hard-pressed to get over 16.5
> > >at 70-75 MPH. I used to be able to pull 17-18 at those highways speeds.
> >
> > When put together with the ticking sound (if it's pinging), these symptoms
> > sure point to a leaking belly pan gasket. Are you experiencing a
> > more-than-normal oil level drop as well?
> >
> > What is your mileage? The O2 sensor(s) and its circuitry conditions
> > could also explain your mileage loss. The sensor gets lazy over
> > time. Dirt etc. contamination is also a common cause of failure
> > of the sensor (thinking of the wild things that everyone does with
> > their trucks at Jon's BBQ).
>
> My first thought was the gasket as well, but I didn't see much in the
> manifold
> 2 weeks ago when I had the TB off.
>
> I'm at 41K right now. I suppose those O2 sensors might have gotten dirty at
> Jon's, there was a small amount of crud flying around :). O2 sensors are a
> little over my "well, let's try it" price but if the other stuff doesn't
> work
> out, I'll go for it.
>
> > >At Daktoberfest, Jim Knox thought he heard a misfire when I had it in
> > >Neutral and got the revs up.
> >
> > Misfire will cause the O2 sensors to send false readings to the PCM
> > resulting in increase gas usage as well as dumping raw gas into the
> > exhaust. Have you smelled any gasoline fumes around the truck?
>
> Maybe, but I haven't been checking close. I'll try to be more observant.
>
> > >Would it be worth pulling and cleaning the fuel injectors? What's the
> > >procedure for this, and do I need a special socket?
> >
> > Do you have the url for Jon's MPI installation? The section for removing
> > the injectors (no special tool required) may be there. If not, let me
> > know, and I'll copy it from the printed installation guide. The only
> > messy part if purging the gasoline from the line and the rails.
>
> I can find it on the site; if I can't locate it, I'll drop you a private
> line.
>
> >
> > >I really, really, really do not want to bend over and pay the dealer to
> > >look at this. I'm well out of warranty at this point. I want to do as
> > >much as I can myself before resorting to a dealer visit. Is it possible
> > >that my belly pan gasket is only very slightly leaking, not enough for
> > >oil to come in? Valve lifters? andy
> >
> > Do the ignition maintenance first? Maybe try to localize the
> > ticking location. See what improvements occur and let us know.
> >
> > Good luck.
> >
> > Bob
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