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Shannon
Dodge Dakota
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10/06/2006
23:46:11
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 Subject: 3.9ltr V6 Throttle Body Swap Problem.
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Ok. I finaly got a V8 throtle body for my '98 V6 Dakota. I installed a new TPS and Throttle Valve Sensor.We didn't touch anything else at all. Now, when my automatic shifts from 1st to 2nd and then 3rd it's like it's "hurrying" thru the gears. When it's in 3rd and OD it's just fine, and has outstanding performance. But in the first 2 gears it just jumps thru them. I have adjusted the throttle valve cable and no luck. And there is no check engine light. The throttle body came off of a 2000 V8 and there was no shifting problem at all on the way over to my buddies where we did the swap. Any help would be great.
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Huggins
Dodge Dakota
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10/08/2006
13:17:12
|  RE: 3.9ltr V6 Throttle Body Swap Problem.
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What's the tps voltage set at (should be somewhere in the neighborhood of .7 - .9 volts on some and most will need to be below .9v)? Tranny shifting and other components go off of the tps voltage. All vacuum lines to the MAP were hooked up, right? New gasket used?
Just some thoughts and things to check ;)
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Shannon
Dodge Dakota
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10/08/2006
17:28:57
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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Yeah. Used new gaskets on both the bottom and top of the TB. Cables are all connected. Someone mentioned that they have to replace their throttle valve cable cause it's stretched, so I may check into that. I have a voltage meter, but there are so many settings that I have no idea which one to use. The old sensor voltage was correct, but this is a new one, so it may be set wrong. The garage I use said that maybe it reset something in the computer, so I may ket them check it out. Could'nt hurt. It just pisses me off. Everytime something happens, everyone just scratches their heads. The guy at Dodge garage even said it was VERY strange, that it only happens in 1st and 2nd. I'll keep you guy's posted. Thanks again.
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Huggins
Dodge Dakota
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10/08/2006
19:41:56
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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OK, if you still would like to check the voltage I can try to explain the proper procedure...
On your volt meter there should be a setting with a large V, a solid line, then a dotted line just below the solid line "not the wavy line or the mV setting"... This is your Direct Current Voltage setting. Now all you have to do is hook your black lead "wire" up to the negative on the battery, then take your red lead and using a paperclip "bend one end out straight" and alligator "jaws looking thing that goes on your meter leads", back probe the center wire on your tps "should be 3 wires side by side or in line with one another". YOU MUST MAKE SURE THE IGNITION KEY IS SET TO THE RUN POSITION TO CHECK.
Sorry for the caps lock, but it's worthless if the key isn't on to do this :)) Sounds like something else is wrong, but it never hurts to check. A tps can cause some very funny things to happen ;)
Hope this helps and if you need any more info on how to do this, feel free to ask...
Greg
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Shannon
Dodge Dakota
JOIN HERE
10/08/2006
20:39:32
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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Thanks for the help. Which setting do I choose on the meeter? I know I sound like a retard, but there's like 6 settings under that one. And what else do you think it might be? Like I said, there's no hestation after 2nd, just odd shifting getting there and it never did it before that. Thanks again.
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Huggins
Dodge Dakota
JOIN HERE
10/08/2006
21:33:16
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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There should just be a single setting, by itself, with the big V, then over the big V there is a straight line and a dotted line just under the straight line.
Now there are also mV and AC volts, but those settings don't get used, just the DC volts one.
All of my meters are like this. Do you have a pic of your meter?
Hope this helps,
Greg
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Shannon
Dodge Dakota
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10/08/2006
23:30:35
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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Looks alot like this one...http://www.sears.com/sr/javasr/product.do?cat=Electrical+Shop&pid=00999446000&vertical=TOOL&subcat=Multi-Meters%2C+Testers+%26+Accessories&BV_UseBVCookie=Yes
but it's not exaclty like it. I also was just told that a 5.2 has a 50mm TB and a 5.9 has a 52mm. I hope that's not what's wrong. Thanks
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N56629
Dodge Dakota
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10/09/2006
06:34:33
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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The throttle body for a 5.2 and 5.9 are identical parts. Install the original sensors and cable bracket from your v6 tb. I'm a bit surprised that you make no mention of swapping throttle cables. Did you use the stock cable or install a v8 cable? As for the TPS, it is rare that they are out of spec.
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Shannon
Dodge Dakota
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10/09/2006
08:34:37
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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No. I used a new accelerator cable, for a V8, but not a throttle valve cable. And would the bracket really make a difference?
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Huggins
Dodge Dakota
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10/09/2006
11:44:25
|  RE: 3.9ltr V6 Throttle Body Swap Problem.
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OK, I see what you were referring to... This is basically a meter used by electricians with stepped voltage checks...
Just use the number 20 under your DC voltage options. All this is, is the max voltage that can be checked or displayed accurately in this option. If you have a 12v option, your better off to use it, but just use the 20 if you don't. Also if there is a 5v option use it instead of the 20. Your just looking for the smallest reading option that will display your voltage (.7v - .9v). You can look at the decimal readout to get the right setting, but will be the lowest possible option on your meter more than likely.
Hope this helps more than it confuses...
As for your bracket ordeal. I'm pretty sure all the V8's and V6's used the same brackets and rods, did they not? Hopefully someone on here can help you out on that one.
Greg
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Shannon
Dodge Dakota
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10/09/2006
23:29:11
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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Thanks. I used to know how to use it, but have'nt had the need lately. As for the bracket, I'm pretty sure is the same. Hell, I have a V8 TB from a '95 full size van that is identical to the V8 TB from the 2000 Dakota. So I'm pretty sure that it's not the bracket. I'm gonna try a few more things, then just take it in and see what the find. May just be the computer. Who knows.
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N56629
Dodge Dakota
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10/10/2006
06:33:49
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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Isn't the '95 tb and egr type? If so, they may look the same but they are not. If you are running the older egr type then you might have some problems with the way it runs and eventually get a trouble code.
Different brackets or even a slightly bent bracket can cause the same condition as a misadjusted throttle valve cable. If you have adjusted the tv cable correctly then it shouldn't really matter what bracket you have or the condition of the bracket. Usually I install the original bracket because it is easier and eliminates that variable.
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Shannon
Dodge Dakota
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10/10/2006
08:53:15
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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I don't know if the '95 is like that or know. It has the same sensors and everything, but I never tried it. I'll look into the bracket thing to. Thanks.
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N56629
Dodge Dakota
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10/10/2006
10:45:45
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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Yep, the sensors and everything on the outside is the same. The MAP sensor looks the same but it's not. The vacuum signal is different on the egr type. If you are running a '95 or older tb let me know and I'll post some pictures showing the difference.
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Shannon
Dodge Dakota
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10/10/2006
23:36:41
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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No. The one we put one is from a 2000, but I would love to see those pix. I still have the one from the '95 full-size van.
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N56629
Dodge Dakota
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10/11/2006
06:44:16
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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If you don't have these slots then you have an egr type.
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Shannon
Dodge Dakota
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10/15/2006
21:39:08
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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I got it fixed. Seems the cable bracket that came on the TB was bent forward where the throtle valve cable connects about a 1/4". I just swapped the old one for it and voila, it worked. I know, I'm an ass for not checking it before we put it on, but that's the sort of thing that you just learn as you go. Another thing. I have noticed on fiv0motorsports.com that the injectors for the 3.9 has changed. I found the guy who they get theirs from, www.injectors4u.com, for like $19.99 a piece. Here's my question. What parts # do you order and what is the .lbs for the injectors? Thanks for helping.
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N56629
Dodge Dakota
JOIN HERE
10/16/2006
06:44:45
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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The bent bracket is the reason I advise everyone to install all of the original components on a replacement tb, especially if they performed well before the swap. This would probably prevent 90% of all the problems people are having with swapping tb's.
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Shannon
Dodge Dakota
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10/16/2006
08:28:59
| RE: 3.9ltr V6 Throttle Body Swap Problem.
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I totally agree. My buddy swears he said something before hand, but I can't remember. And you also don't know if the V8 maybe a little different, ya know? Ya live and learn.
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