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95 dakota running poorly

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95 dakota running poorly - 2/9/2005 10:35:21 PM   
juleio

 

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i have a 95 dakota 4x4 v8 and when i get to around a half tank of gas the truck run bad. misses so bad under a load that the dash shakes. fill it up and it runs great. anyone ever had this problem?
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RE: 95 dakota running poorly - 2/10/2005 6:56:40 AM   
hwystar

 

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Must obviously be a fuel pick up problem in the tank. Only way to tell that I can think of is to drop the tank and take out the pump-filter-regulator assembley and inspect it. If I were you while I was at it and had everything apart I would replace this assembley. If you are having fuel delivery probs and this is the place where the prob originates then all the other peices are likely on their way out as well. You can replace these parts individually but sure as shootin you will fix one and then the next one will act up shortly there after. This is not cheap by any means but if you are getting the work done for you you will have to pay to drop the tank every time the next part fails. I have a 94 v8 powered Dak and it stumbled like hell when my fuel pump started to go south. I figured since the other parts are the same age as the pump then they are all going. Hope this helps. Hwystar

(in reply to juleio)
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RE: 95 dakota running poorly - 2/11/2005 9:28:52 PM   
injmopar

 

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Those are sounds of a weak pump. But next time it dies get out and take off the gas cap and listen for high vaccuum.If you can get back in and drive away. Might have a pluged vent

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RE: 95 dakota running poorly - 2/14/2005 10:08:33 PM   
juleio

 

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thats what is so confusing it doesnt die, it just runs bad at 1/2 a tank and lower.when its full or above 1/2 it rus lik a raped ape.

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RE: 95 dakota running poorly - 3/2/2005 12:08:22 PM   
MoparGal18

 

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well atleast im not the only one! my 95 dakota does the same thing...but it does it when im at around 1/4 tank of gas and running on the highway...it'll putt so bad that if I try to accelerate it'll start making popping noises and won't go over 50. I figured it was the pump/filter...dad doesn't believe me tho :-/

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RE: 95 dakota running poorly - 3/16/2005 5:45:48 PM   
Gone Fishin


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If you decide to check the pump and screen, you may actually find it easier to unbolt the front end of the bed and lift it as opposed to dropping the tank.

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RE: 95 dakota running poorly - 3/18/2005 5:42:14 PM   
dak

 

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yeh i have a 95 also and the damn thing shakes really bad also....its usually around a 1/4 tank of gas or less....i just posted asking for info also..... good luck

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RE: 95 dakota running poorly - 3/31/2005 5:38:11 PM   
TejasMtnBiker


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funny things happen to mine as well... I ended up replacing the entire wiring harness to all the sensors and it ran great for weeks, not when I got to get it inspected it's eating gas and will not pass inspection.. @ cold start it runs fine but after it warms up a lil there's a spot off idle that it bogs a tad.. miles per gallon have dropped, all sensors are new but I read that a 195 degree thermostat will allow the computer to think it's warm tot he correct temp and stop running so rich... well anyways I'm gonna try that tonight and re check all the connections and wires, vaccum, lines and hoses for craks etc, one may be loosened a bit....

(in reply to juleio)
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RE: 95 dakota running poorly - 4/2/2005 12:00:07 PM   
Locomotion

 

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My '95 3.9/auto Club Cab has been doing the same thing. Just after 1/2 tank, it starts running rough and slowly gets worse as the fuel level goes down. I fill up to over 1/2 and everything is fine!

With many people having this problem, it sounds like it has something to do with the assembly/design. But I would like to know/understand WHY it's doing that! It's almost as if there is a vacuum leak in the pick-up below a 1/2 tank. I just never had the assembly out and don't know how it all works together or even what it looks like. I'm use to external fuel pumps and filters. It seems that if it were a weak pump, it would do it all the time and I can't believe that so much crud had accumulated in the tank that it clogs the filter/pick-up at almost 1/2 full! I've run it almost dry to eliminate the possibility of "bad" gas, but it continued with fresh gas too.

< Message edited by Locomotion -- 4/2/2005 12:05:03 PM >


_____________________________

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Locomotion Racing website / Recommended products & services.

(in reply to TejasMtnBiker)
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RE: 95 dakota running poorly - 5/31/2005 6:34:38 PM   
dak

 

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i have the same problem as talked about above....i was wondering if anyone has tryed to fix the problem and what they did to make it better....any input will be appreciated....max

(in reply to Locomotion)
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RE: 95 dakota running poorly - 6/1/2005 4:08:59 PM   
95dak318


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I had a similar problem like that once, loss of power, the truck would run rough around 1800-2100 rpms, and fuel guage was always acting funny.
turned out two of my injectors were clogged, so I had them cleaned, i also had the fuel modual replaced as well now the 318 runs great.

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RE: 95 dakota running poorly - 3/4/2006 1:48:09 PM   
bcbill

 

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I have the same problem. Feels like its running out of gas at about 3/8 tank.

Could it possibly be the fuel pickup not sitting deep enough in the tank? Can this be adjusted?

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RE: 95 dakota running poorly - 4/4/2006 6:05:08 PM   
Locomotion

 

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Bill,

I can't tell if anything can be adjusted of not. I recently got a (hopefully good) used fuel pump/sender assembly out of a wrecked Dakota. It screws into the top of the fuel tank. The assembly is basically like 2 plastic cylinders with the bottom one rising into or dropping out of the top section, depending on fuel level. The pick-up is, naturally, at the bottom. I haven't examined it too closely yet to see if I can guess at why the problem starts at around a 1/2 tank of fuel.

The only 2 options of getting at it is removing the truck bed for access to the top, or running the tank low and dropping it from the bottom. Not sure when I'll get around to getting the original out.

(in reply to bcbill)
Post #: 13
RE: 95 dakota running poorly - 4/4/2006 6:16:29 PM   
bcbill

 

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quote:

ORIGINAL: Locomotion

Bill,

I can't tell if anything can be adjusted of not. I recently got a (hopefully good) used fuel pump/sender assembly out of a wrecked Dakota. It screws into the top of the fuel tank. The assembly is basically like 2 plastic cylinders with the bottom one rising into or dropping out of the top section, depending on fuel level. The pick-up is, naturally, at the bottom. I haven't examined it too closely yet to see if I can guess at why the problem starts at around a 1/2 tank of fuel.

The only 2 options of getting at it is removing the truck bed for access to the top, or running the tank low and dropping it from the bottom. Not sure when I'll get around to getting the original out.



Would you be able to post a picture of the pump assembly?

(in reply to Locomotion)
Post #: 14
RE: 95 dakota running poorly - 4/4/2006 6:59:24 PM   
Locomotion

 

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Joined: 7/23/2004
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I don't have a digital camera. But here is a pic link from an on-line parts store.

Dakota fuel pump.

They have a "return" and "returnless" system version. Don't know what I have in my '95 or what I got out of the '96. But the OEM version I pulled didn't have that "air filter" looking filter on the bottom. It just has a flat, little filter pillow (about 2 1/2" square) at the bottom between 2 "feet".

There is a large ring-nut, kind of like is found on Mason Jars used for home canning/preserving, which screws down over the lip you see at the top. The top 1/2 cylinder part on the one I got is also more "enclosed" than what's shown in the photo. So the sending unit isn't visible until the bottom is 1/2-way down. The bottom has 4" of travel.

The only thing I can think of at the moment is perhaps it has a bind at 1/2 tank and below that doesn't fully submerge the filter-pillow, but still slowly drops to keep the truck barely running.


(in reply to bcbill)
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