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busracer76
Dodge Dakota
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4/19/2012
17:09:11

Subject: stalling and lost power
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Message:
Looking for some help here. I have a 98 Dakota 3.9L,
automatic, 2wd with 195,000 miles. I'm having problems with
the truck stalling unpredictably. There's nothing in particular
that seems to cause it. You can be going down the road or
idling in park and the truck will shut off just as if you turned
the key off. When it stalls, sometimes it will restart right away,
sometimes it will restart and stall right out unless you hold
the throttle around 1/4 the way open and then you will have
to hold it there for around a minute before the truck will idle
on its own. Then there's times where it may take me ten
minutes up to a couple hours before the truck will start again.
Now its latest trick besides the stalling is while you're going
down the road, the truck will lose power and have no reaction
when you hit the gas. When you watch the tach, it will slowly
drop down until somewhere around 1000rpm then the truck
will regain full power back and run normally, sometimes
backfiring really loud. Its definitely backfiring out the exhaust
but im not sure if it ever pops back through the intake. I've
had a fuel pressure gage hooked up and both when the truck
is dead or in "lost power" mode, it maintains a consistent 52-
55psi. The following items have been changed since this
problem began: plugs, wires, cap, rotor, coil, crank sensor,
coolant temp sensor, map sensor, and the computer. The
throttle body has been removed and cleaned along with the
IAC (all sensors were removed while cleaning). The TPS and
IAC are all showing normal function when connected to the
scanner. Also the cat. converter has been removed and
replaced with straightpipe (old one was clogged and don't
want to put the new one in until the backfiring issue has been
resolved). All of these issues started well before the cat. had
been removed. I've also checked for vacuum and intake
gasket leaks and there doesn't appear to be any. The only
code that comes up is the P0351 (ignition coil #1 primary
circuit, peak primary circuit current not achieved within
maximum dwell time). The truck does not always throe a
code when it acts up. I have gone through checking all of the
electrical connections and wiggling all the connections and all
the wiring and even sprayed them down with water looking
for a short or bad connection. The only thing I haven't done is
take all the wires out and look them over one at a time for
damage. Nothing I do either with wiggling wires or driving
can recreate the problem. Its totally intermittent, the truck
may run good for two minutes, might run good for two days.
Over the past weekend, I took the distributor cap off to take a
look at the pickup coil and the rotor was all burned and
pitted. It looks more like its five years old, not five months
old. Also, the #5 cylinder tab on the cap shows much more
wear than any of the rest. There was also quite a bit of brass
dust on the pickup coil from the cap. I've read online that
there have been some instances where the bushing in the
distributor wears out causing the shaft to move around and
cause timing issues. Could this be a possibility? Is there a wire
or connection that is known to be troublesome? With all the
reading I've been doing, I see this seems to be a common
problem with this truck to but nobody seems to have a
common fix to it. Im leaning toward changing the distributor
next but sick of spending money and not getting anywhere. I
am completely stumped. The truck is all standard factory
equipment, no upgrades. or aftermarket equipment. Any help
or guidance would be greatly appreciated. Hopefully I have
included all necessary information. Thank you for your time.



busracer76
Dodge Dakota
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4/19/2012
18:10:34

RE: stalling and lost power
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Forgot to mention, also replaced asd relay.



daddio
Dodge Dakota
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4/19/2012
18:18:18

RE: stalling and lost power
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Try installing a throttle body spacer and clean out your throttle body and iac again and that should fix it unless your intake manifold belly pan gasket is blown out in which your case is quite possible. That should be replaced as well as a new gasket set.



JET_Fusion
Dodge Dakota
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5/02/2012
22:39:40

RE: stalling and lost power
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I've chased the same gremlin with my '98. (You can read about it around here.) Since you've already changed most of the electronics, might as well change the Crank Position sensor and the Camshaft Position sensor. I don't believe one is going to the magic resolution, but it might take both.



busracer76
Dodge Dakota
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5/04/2012
15:01:08

RE: stalling and lost power
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I already changed both, made no difference. I even went
through and changed the distributor. I've even consulted a
few mechanics and they are completly stumped along with
myself. Really thinking now its a bad wire somewhere, but
where? I've gone through and wiggled all the wires and
connections and even sprayed them down with water and
nothing i do recreates the problem.



3.9s are slow
Dodge Dakota
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5/04/2012
20:39:23

RE: stalling and lost power
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If the 98s have the famous bad splice under the batt like the 1st generation has take a look at it by peeling back the tape and checking the wires.



busracer76
Dodge Dakota
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5/05/2012
01:42:17

RE: stalling and lost power
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I dont believe it does but i havent started disecting the wiring
yet. Where was that located, the harness that comes out of
the power distribution box headed toward the firewall but the
splice would be near the box correct?



daddio
Dodge Dakota
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5/05/2012
08:47:36

RE: stalling and lost power
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If indeed the '98's have that splice, it is about 4-6 inches below the PDC. Three wires to one. I think they are red or red w/ white stripe.



busracer76
Dodge Dakota
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5/05/2012
10:19:06

RE: stalling and lost power
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It would be on the harness that runs through the firewall, not
the one that runs across the front of the truck to the computer
correct?



daddio
Dodge Dakota
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5/05/2012
18:09:44

RE: stalling and lost power
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I think it is the one going to the PCM. It feeds the ignition, PCM and fuel pummp circuits. I believe it is called splice #115.



JET_Fusion
Dodge Dakota
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5/08/2012
00:57:44

RE: stalling and lost power
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I also changed the CAT and muffler. Regarding the backfiring issue, my problem was related to a bad spark plug wire.



Harold Sparks
Dodge Dakota
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5/20/2012
12:50:34

RE: stalling and lost power
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Has anyone changed the fuel filter and or fuel pump. I am having the same prolbem with a 97 model and no one can fix it?



daddio
Dodge Dakota
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5/20/2012
13:25:44

RE: stalling and lost power
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Some say it is easier to remove the bed than drop the fuel tank. Especially if the tank is full. Have you checked teh fuel pressure at the fuel rail? Have you checked for any codes?



Harold Sparks
Dodge Dakota
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5/20/2012
15:54:35

RE: stalling and lost power
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Thanks for the reply. I have had this 97 DodgeDakota SLT V-6 to the auto shop's,dealerships and mechanics so many times I don't know what they have done to it? It starts great,runs great until it decides to not take gas and lose power.Sometimes at 30mph or other times at 60mpg.Sometimes it will backfire through the exhaust other times it don't. As for showing a code if not hooked to a computer at the time of these malfuncations how can one tell?



daddio
Dodge Dakota
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5/20/2012
16:30:12

RE: stalling and lost power
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You can read stored codes without a computer. Cycle the key as follows: ON/OFF/ON/OFF/ON the codes will display in the odometer as PXXXX and when it's finished or there are no stored codes it will display Pdone. The PCM will store a code without tripping the CEL. To trip the CEL the PCM has to see the same malfunction in three consecutive drive cycles. If you get any codes post back here with them.

As far as changing the fuel pump, unless the running pressure is not within spec, there is no need to change it.



busracer76
Dodge Dakota
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5/20/2012
22:28:36

RE: stalling and lost power
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Rent a fuel pressure gage from autozone, hook it to the fuel
rail, run the gage through the hood and tape it to the
windshield. When mine acts up, i thought it was starving for
fuel but it holds a steady 50-52psi. Im still fighting with mine
and have been for six months now. Never had a vehicle
stump me like this before. Whats even more frustrating is
that when i want it to stay dead so i can check circuits and
signal, the damn thing will always start!



Tbender
Dodge Dakota
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7/10/2012
02:57:59

RE: stalling and lost power
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I had the same issue and it was the idle air control.



Tracy a meese
Dodge Dakota
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9/09/2013
20:23:17

RE: stalling and lost power
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Message:
I'm have same problem on 97 Dakota , just quits running ,
some times soon sometime later , pressure tested it after I
replaced fuel pump thought that was it , but no , fuel lines were
bad fixed those ran good for two weeks , then just stopped on
road agin , and would not start , like is not getting fuel , maybe
sensor somewhere , have it read tomorrow hope some code
showing problem comes up



Markymark
Dodge Dakota
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1/09/2016
00:00:33

RE: stalling and lost power
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Message:
If everyone is having this problem
shouldn't someone have the correct answer
by now??? Not a bunch of wasted time and
money!??? I have a 98 3.6 and have put
over $1800 into it just this month. No
luck with anything.



JD West
Dodge Dakota
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2/28/2016
16:30:43

RE: stalling and lost power
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Message:
92 Dakota 3.9. I am having the very common stalling problems it seems. Its stalling while driving or sitting still, no pattern what so ever. It has stalled after running for an hour and even as little as 15 minutes while its warming up before work. No check engine light, nothing just dies as if you turned it off. I have replaced the distributor cap, rotor button, plugs and wires, pick-up plate, and ignition switch, heat gauge sensor and the fuel filter. I was told my computer could be bad but before I spend anymore big bucks I would like to know where to look for the bad splicing issue? A picture of the location or what it may look like will be greatly appreciated!



BBJ
Dodge Dakota
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4/17/2016
14:17:36

RE: stalling and lost power
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Message:
99 Dakota here. Same problem, engine runs fine when out of
no where it loses power. Almost feels like gas filter but then it
recovers and runs fine. Loose wire somewhere?

Has anyone actually solved this problem? Thanks in advance
for any help.




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