Sounds like your MAP sensor is bad, not reading the vacume anymore, and
maybe your thermostat is stuck open for the other one....
TJ
----- Original Message -----
From: "Lynn Gustafson" <crtech@hot.rr.com>
To: "Dakota ML" <dakota-truck@buffnet.net>
Sent: Monday, January 08, 2001 10:56 PM
Subject: DML: Engine problems
> I ran the engine codes on my truck. It is an 89 Dakota with a 3.9L V6. 2
> of the codes I do not know how to correct. The first one is code 13 which
> is "No difference recognized between the engine MAP reading and the
> barometric pressure reading from start-up." and the second one is code 17
> which is "Engine does not reach 50 degrees F with in 5 minutes with a
> vehicle speed signal or engine does not reach operation temperature with
in
> acceptable limits."
>
> I know that the back pressure transducer is bad. I just found it melted.
I
> have bought the new part, which I had to buy with the EGR valve as dodge
> only sells it as one part. The parts guy, who seemed to be quite familiar
> with the failure, said that the most likely cause was that the exhaust
(most
> likely the CAT) was stopped up causing more back pressure to the EGR valve
> and melting the transducer. The exhaust pipes have just been replaced
from
> the CAT back and I would have thought that any shop doing the work would
> have caught a stopped up CAT, but I guess not. Can anyone tell me if this
> is the honeycomb CAT or the one with the small beads in it.
>
> I also found that on the fresh air intake hose leading to the intake has a
> small hose teeing off from it that connects to the SMEC unit. This hose
was
> not connected. I have already reconnected this hose and have found that
it
> does not have the sag off the line like it use to.
>
> Any comments or suggestion on what these two error codes mean and how to
fix
> them?
>
> Thanks
>
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