Bobby,
The cam position sensor on the 4.7 is located on the front/top of the right
cylinder head. It shows it on the passenger side, front of the engine, right
at the top of the cylinder head just below where the 'vavle cover' gasket
is. has a single bolt holding it in to the engine.
To clear the codes..........Is your check engine light on? If so you may
have to go to the dealer. To be honest I would just so the problem is known
to them. They can clear them right away. If the light is out and no problem
exists then according to the book, after 40 warm up cycles with out
additional failures, it will automatically clear itself. A warm up cycle
must meet the following criteria:
1. Coolant starts below and rises above 160F
2. Coolant temp. must rise by 40F
3. No other faults can occur
Or you can try the old stand-by of yanking the battery for a while but I
can't reccommend this.
Thanks,
Gary
----- Original Message -----
From: "Robert Cash" <rcash@tbcnet.com>
To: <dakota-truck@buffnet.net>
Sent: Sunday, January 30, 2000 10:07 AM
Subject: DML: One more question Gary if you have a minute..Was Re:
P0340...P1391 Help!
> Sir,
> I have lost the symptoms, and would like to clear the codes to see if
they
> return, pulling the neg terminal did not do it, how does one clear the
codes
> on a '00?
>
> I checked the whole top of the engine and did not find a loose connection
of
> any sort, just to make sure you said the top right front, by that you mean
> the driver side bank closest to the radiator right?
>
> Thank so much for you time.
>
> Bobby
>
> -----Original Message-----
> From: owner-dakota-truck@buffnet.net
> [mailto:owner-dakota-truck@buffnet.net]On Behalf Of blackdak
> Sent: Sunday, January 30, 2000 4:43 AM
> To: dakota-truck@buffnet.net
> Subject: DML: Re: P0340...P1391 Help!
>
>
> P0340 - No cam signal at PCM (No fuel Sync)
> P1391 - Intermittent loss of CMP or CKP (Loss of the cam position sensor
or
> crank position sensor has occured. For PL2.0L
>
> Here is what the manual says about the CMP :
>
> The cam position sensor on the 4.7 is located on the front/top of the
right
> cylinder head. (It shows a nice picture of it too, kind of hangs down from
> the top of the cylinder head in back...had a plug, I would check to make
> sure the bolt and the plug are tight).
>
> The CMP sensor contains a hall effect device called a sync signal
generator
> to generate a fuel sync signal. This sync signal generator detects notches
> located on a tone wheel. The tone wheel is located at the front of the cam
> shaft for the right cylinder head. As tonewheel rotates, the notches pass
> throught the the sync signal generator. The pattern of the notches
(veiwed
> counter clockwise from the front of the engine) is: 1 notch, 2 notches, 3
> notches, 3 notches, 2 notches, 1 notch, 3 notches and 1notch. The signal
> from the CMP is used in conjuntion with the crankshaft position sensor to
> differentiate between fuel injection and spark events. It is also used to
> syncronize the fuel injectors to their respective cylinders.
>
> Hope this helps,
> Gary
>
> ----- Original Message -----
> From: "Robert Cash" <rcash@tbcnet.com>
> To: <dakota-truck@buffnet.net>
> Sent: Sunday, January 30, 2000 12:24 AM
> Subject: DML: P0340...P1391 Help!
>
>
> > Just pulled trouble codes P0340 and P1391 after driving through some
> pretty
> > thick snow for about 2 hours, with MAJOR backfiring and missing....
> >
> > Any ideas would be greatly appreciated !!!!!
> >
> > Bob Cash
> > 00 Dakota 4X4 4.7L
> >
> >
>
>
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