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Three.9HP
Dodge Dakota
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2/19/2005
17:30:26
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 Subject: My Dak keeps fouling plugs
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I have a 93 3.9L Dak and it backfires for about 20 minutes untill it warms up. It wont let me rev the rpms above 2,000 untill it gets warm then let's me rev it untill the sun goes down. However, if I let the motor ride below about 1,200 rpms it loses fire and wants to stall out. Someone please help me. I have had it on diagnostics and to two or three machanics and they dont know what the problem is. There is a new crank and temp sensor in it. It's a pain trying to drive reving the motor and changing plugs once a week. Any ideas would really be appriciated. Thanks!!!
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93dak4x4
Dodge Dakota
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2/19/2005
18:46:40
|  RE: My Dak keeps fouling plugs
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change your coil. it may just be that the coil is weak and when it warms up it gets a little stronger. so definetely try changing the coil, they arent that expensive.
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maybe but
Dodge Dakota
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2/20/2005
10:56:05
| RE: My Dak keeps fouling plugs
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sonds like you are runnin rich, lean it out.
most likley they just put a scan tool on it. What it needs to have is a scope that will check things like injector pulse width that a scan tool can't.
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Three.9HP
Dodge Dakota
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2/20/2005
15:23:48
| RE: My Dak keeps fouling plugs
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It definitely is runnin rich. The gas is so rich that it will almost burn your eyes while it's running. But where would I take the truck to get it fixed??? The machanics around here really dont know there head from there @ss. Thanks for the help too!
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Sense
Dodge Dakota
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2/21/2005
09:54:55
| RE: My Dak keeps fouling plugs
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I sounds like the 02 sensor needs to be changed. I
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maybe but
Dodge Dakota
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2/23/2005
18:05:57
| RE: My Dak keeps fouling plugs
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uh sense????
you are way off bud, the open loop cycle that is going on when the engine is cold DOES NOT USE FEEDBACK FROM THE O2 SENSOR.
did you miss the part that says: I have a 93 3.9L Dak and it backfires for about 20 minutes untill it warms up
since you seam to not trust the local mechs workin on it call the dealers in the area and ask the service department if they have a scope. THEN WATCH THEM ACTUALLY USE IT. INSIST ON IT!!!
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Three.9HP
Dodge Dakota
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2/23/2005
18:59:40
| RE: My Dak keeps fouling plugs
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I really thank you all for the help. And if ya got any more ideas, keep'em rollin. I have an ace troubleshooter that helps dodge machanics looking at my truck tomorrow. Thanks guys!!
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Bob Lincoln
Dodge Dakota
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2/23/2005
19:06:24
| RE: My Dak keeps fouling plugs
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Check fault codes.
http://allpar.com/fix/80s-codes.html
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three.9HP
Dodge Dakota
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3/02/2005
09:51:40
| RE: My Dak keeps fouling plugs
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Well, My machanic finally got a good look at my motor and said everything was working fine. Check the codes, sensors and eveything. He said the only thing it can be is the computer. Does this sound right??
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93dak4x4
Dodge Dakota
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3/02/2005
10:08:16
| RE: My Dak keeps fouling plugs
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no doesnt sound right, the computer is something they always say and its hardly ever bad. change and check your sensors, i paid a dealership 85 dollars to look at my computer/sensors on their diagnostic tool and it couldnt even tell me that my 02 sensor was bad.
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Three.9HP
Dodge Dakota
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3/02/2005
17:33:16
| RE: My Dak keeps fouling plugs
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He replaced all new sensors to make sure, and it ran the same as it did before. He replaced a lot of new things on it. I'm not getting charched any labor for this so I know he's not trying to screw me over. Is the computer a possibility? This things running funny. The rpm's jump when it finally catches fire.I dunno?
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Three.9HP
Dodge Dakota
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3/04/2005
15:36:21
|  RE: My Dak keeps fouling plugs
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Alright guy's!! I'm getting extremely frustrated with this truck. I just pissed away $258 on the computer and still running like crap. Any body got any ideas? I running out of ideas and money. I have already sank a lot of money into the comp, crank sens.,map sens.,and temp sens. and still nothing to show for it. Please help!! I love this truck and got a lot of high performance goodies to put on it. Thanks for all replies!
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daddio
Dodge Dakota
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3/04/2005
15:52:08
| RE: My Dak keeps fouling plugs
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have you checked the distributor for excessive wear? maybe the drive gear is worn or the dist is sloppy? it seems like you checked just about everything else.
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Three.9HP
Dodge Dakota
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3/04/2005
16:16:39
| RE: My Dak keeps fouling plugs
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Would a O2 sensor make it run rich, and backfire the way it does? To be quite honest, thats the only thing that hasnt been replaced, however it doesnt show up on the diagnostic. But everyone keeps telling me thats not the problem. I dunno?
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daddio
Dodge Dakota
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3/04/2005
16:27:13
| RE: My Dak keeps fouling plugs
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a bad O2 sensor will definitely make it run rich.
change it.
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Three.9HP
Dodge Dakota
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3/04/2005
18:58:40
| RE: My Dak keeps fouling plugs
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I will change the o2 sensor, however would that be part of the reason why it it's so hard to keep running and backfires for 20 minutes while cold?
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Three.9HP
Dodge Dakota
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3/04/2005
19:20:00
| RE: My Dak keeps fouling plugs
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I justed got off the phone with the mechanic. He said the injector pulse is screwed up. But the injectors are not the problem. Either got to be a bad new Crank sensor, TPS, or O2 sensor. But it does have a new crank sen. in it. Which one is most likely to go bad first?
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Three.9HP
Dodge Dakota
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3/07/2005
18:13:56
| RE: My Dak keeps fouling plugs
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I am so relieved!!! I finally found out what was wrong with my truck! It turned out that I just needed a new distributor gear and bushing. Damn I'm so happy!!!
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