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newbie witha a special problem

Old Feb 23, 2013 | 12:32 PM
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Hi guy's I'm new here and have a real special problem I've never encountered before with my 1991 dakota 4x4 3.9 liter.

Here is my problem: after about ten minutes of driving the truck motor start to mess it's running like the wires are crossed, I stop on the side of the road and let the engine run on Idle for a minute or so and after the truck run's fine like there's no problem at all.

Any advice would be apreciated...

Oh yeah I forgot, the tune up has been done, the egr valve is disconected so no clue at all
 
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Old Mar 4, 2013 | 12:12 AM
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It is possible it is a bad oxygen sensor or coolant temp sensor. Also the EGR could be causing the problem if it is bad.
 
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Old Mar 15, 2013 | 05:36 PM
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Okay so I've checked the codes this afternoon and here they are:
12
41
32
27
55
The one that bug's me the most is the 27 wich means injection circuit faillure or something like that....

My question is what should I look for???
The injectors are properly connected the wires seems good what the f*** . I'm totally lost in that one **** I'm used to carburator engines not injectcrap somebody have a good carb intake and a holley to put on my freakin 6??????

No seriously the truck runs good then start to kinda missfire or inject the wrong way bcause it back fires a lot for a minute then suddenly runs smoot again with lot and lot of power......

I'm totalky lost on this one

HELP

... _ _ _ ...
 
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Old Mar 15, 2013 | 07:09 PM
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this would be a TBI engine not a magnum; when was the tune up done? new cap rotor wires? hopefully you didn't use the cheap stuff. the good stuff isnt that much more to buy, exactly the same amount of labor. (2X the amount to redo)
are the plug wires seated in the cap? (NOT just the boots on the towers, you gotta sometime slide the boots up on the wires, seat the terminals and then push the boots over the towers. I have seen tons of them corroded badly there because of this. especially back from the days of points and carburetors, the cap is the same design as the caps were on those old Chryslers.

could be a coil breaking down/shorting out or the distributor pickup, this eng wont have a crank sensor.
 
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Old Mar 15, 2013 | 07:34 PM
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The tune up has been done last year but I just bought a new one and will install it next week.

The engine is a magnum v-6 and all 6 injectors are plugged and the wires seems good, could it be a partially clogged injector????? The truck is a canadian truck and they started the magnum engine earlier than the us trucks

I've experienced a similar problem few years ago on a tbi 305 in a chevy 1500 and the wires where the cause (a bad repair done at a garage so bad that they went out of buisness a few years ago)
 

Last edited by killerbeachboy; Mar 15, 2013 at 08:00 PM.
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Old Apr 2, 2013 | 09:57 PM
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Hello, sounds somewhat similar to my own, on-going saga (see the post about a weird problem). I had a similar list of codes but without the one concerning fuel injectors. Have replaced all that has been suggested and more. Someone replied with a solution to a similar problem being some bad fuel injectors so there might be something to it. Anyway, good luck. If I have a break through, I will post again.
 
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Old Apr 3, 2013 | 08:10 AM
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Thank's, yesterday I was talking to a fwllow enthousiast near my old house and he pointed mee to either the oxygen sensor or the crank sensor.

He also told me if the timing chain have too much slack it could cause the same
 
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