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jeremiah2360
Dodge Dakota
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4/16/2004
23:03:38
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 Subject: RE: 4.7L throttle position sensor
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A cut and paste from JES from another thread;
"by turning the OD off, one is giving the tranny the ability to lock the torque converter in 3rd ... thus producing less heat. By leaving the OD on and running in 3rd gear, you're creating a lot of unnecessary heat that will eventually have a negative impact on your transmission."
I just know the trans will run hotter in OD even if it is not hunting in and out of overdrive. So maybe gearing doesn`t matter.
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Jeeper
Dodge Dakota
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4/18/2004
00:49:13
|  RE: 4.7L throttle position sensor
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The trans will not necessarily run hotter in OD since full torque converter lockup also occurs in 4rth and 5th gears.
I find that once into 5th and lockup the tranny holds this gear very well and is able to climb thru a lot of moderate hills.
I have towed some large trailers (6500lbs) thru the rocky mountains using both OD on and off and after a lot of miles thru mountains, my Jeep tows better with OD on, but not under all circumstances. Remember that if the tranny gets hot the TCM will lock up the converter in all gears except first.
My problem with OD off is when under very high load (big trailer and very steep hill) the tranny stays in 3rd with lockup until it finally shifts down to second. Alternatively, if OD is on, the tranny will first shift down to 3rd and unlock. Very often, the tranny never needs to shift to second.
It is the continuous shifting back and forth between 3rd lockup and second that is hard on the tranny. Hence, OD stays on.
My last comment is that there are several levels of lockup being used by the TCM, not just the full lockup that is easy to feel.
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GraphiteDak
GenIII
4/18/2004
01:01:15
| RE: 4.7L throttle position sensor
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Black2003, what brand gears did you use in your gear swap to the 4.10's? I'm thinking of doing the swap from my 3.55's in my 4X4 QC myself. I'm not sure if I want to do the swap myself or actually PAY someone else to do it.
What did it cost to swap your gears in both axles?
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Jb
Dodge Dakota
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4/30/2004
14:43:40
| RE: 4.7L throttle position sensor
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DaveO76 I had trhe same problem with my Dakota as you did. I thought it was my tranny but it ended up being the plugs. Try changing them and see what happens.
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Azkd
Dodge Dakota
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6/05/2007
22:11:22
| RE: 4.7L throttle position sensor
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I own a 2001 Dakota with a 4.7l and 45RFE trans. I just replaced the TPS and was wanting to know if I need to clear diagnostic trouble code. The CEL never came on before or after the change is that normal? Thanks!!! Steve
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Massey
Dodge Dakota
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6/07/2007
19:16:14
| RE: 4.7L throttle position sensor
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Azkd, Changing a sensor can sometimes cause a CEL if the new sensor is not the right one, not installed properly, or just a little off the OEM one that was working correctly. This is no biggy if it is a little off the OEM spec the computer will usually "Learn" your new sensor and once trouble codes are cleared you will be fine again. TO clear the code remove the - (NEG) battery terminal and touch it to the + (POS) terminal. This will not hurt anything in your truck it will only cause the capacitors that are in your computer to hold the memory to discharge thus clearing your codes. If there is no condition that will trip a code then the CEL will stay off. If it comes on then you have a problem.
You can also remove codes by removing the - (NEG) terminal for about 1 hour (the caps discharge slowly). ALso some auto part stores will let you borrow a code reader that will remove the codes electronicaly.
Massey
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daddio
Dodge Dakota
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6/07/2007
20:03:35
| RE: 4.7L throttle position sensor
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you can also clear codes by disconnecting the + cable from the battery and turn the key to start and hold for about 1 minute.
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azkd
Dodge Dakota
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6/14/2007
13:49:41
| RE: 4.7L throttle position sensor
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Thanks for the advice guys!! I changed TPS and new plugs on 2001 dakota 4.7l and gained 5 mpg. Has anybody heard of or used Sea Foam,and Sea Foam trans tune??? Awesome web site!!!
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1hotkadota
Dodge Dakota
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6/14/2007
17:10:23
| RE: 4.7L throttle position sensor
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Hey azkd, do you live in Phoenix?
I am going to speedworld on June 23rd and it would be nice to see another Dak down there.
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Jim D
Dodge Dakota
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6/20/2007
21:30:06
| RE: 4.7L throttle position sensor
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I'm so happy I found this place, my 2001 quad cab has been bucking around 35-55 depending where I'm driving roads or highway, idle not stable and hard downshifting. I have a code reader telling me tps, so after reading this thread, bought one today, 10 minutes and the truck is 100% better... 112000 miles on it, I'll let you know how it holds up!! so much here to read so much to learn about my truck... I love my Dakota!
Thanks
Jim
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Curly
Dodge Dakota
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6/20/2007
23:02:11
|  RE: 4.7L throttle position sensor
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well welcome aboard Jim D
and we're all Dakota freaks around here
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QCandCap
Dodge Dakota
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2/02/2008
08:55:09
|  RE: 4.7L
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I have an '01 QC 2wd, 4.7L V8 with 85K. First of all, I love my truck! The check engine light has been on for about 6 months. The "code reader" from autozone suggested that I needed to replace the o2 sensors (and they would be happy to order those for me.) Any suggestions, I have done all the basics, in terms of changes, oil, filter, changing the plugs and wires this weekend...etc. It shows a quick loss of power on rare occasion driving down the highway, and gas mileage is plummetting to all-time lows (14-15 at best). Trying to not have major financial repairs, and can a novice perform the repairs?
Any help is appreciated,
QCandCap
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TexasTodd
Dodge Dakota
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2/02/2008
13:46:54
| RE: 4.7L throttle position sensor
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QCandCap,
#1, you should have started another thread- no big deal.
the code or codes will tell you exactly which sensor(s) is bad.
YES replace them. MUCH better MPG when they work right!
And, YES, you can do it yourself! The ones before the cats are usually the culprit, and they are hard to get to, not impossible.
I did my passenger sides before cat sensor a few months ago. I did it in my garage of my house, with NO lifts, NO fender removal, or anything else.
You'll need a drop light to see well.
Also, big $ savings tip, I ordered it on a 800 number, from a dodgedealer somewhere.
the website I forget, something like: alldodgeparts.com, or discountdodgeparts.com, or something like that.
It was the OEM part (no splicing), and a huge savings, for the same dodge part.
Good luck.
Email me(under the envelope) if any more ?'s
PS- someone posted once that they took out the bad sensor, cleaned the area that goes in the exhaust system with a solvent, and reinstalled it and it fixed it.
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Msmith
Dodge Dakota
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6/17/2008
09:28:31
| RE: 4.7L throttle position sensor
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I have an 04 dakota with 111K, the truck has been randomly changing RPMs for the last 50K miles or so. The dealer doesn't have an answer. I can stay driving at 50mph steady and watch the RPMs go up for a second or so and then back to normal and will do it for the entire trip. I don't have any alarms or errors. I have been reading the some of you guys said to change the TPS, I have a mechanic who can do the job. The truck drives fine if it wasn't for the fluctuation, any ideas?
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radio-active
Dodge Dakota
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8/12/2009
09:42:44
| RE: 4.7L throttle position sensor
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I have a 2000 Club cab, 4.7l 2wd, towing package, tire & handling package, 115K miles. It's doing what I see described here, surging at stoplights, engaging and disengaging the lockup torque converter, and somtimes downshifting a bit too readily. It's intermittent, although happening more frequently lately. I suspected a vacuum leak, but the TPS sounds like a possibility too. Has anyone had any definitive results with this problem? Thanks, Terry.
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Fonash
Dodge Dakota
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8/18/2009
21:03:19
| RE: 4.7L throttle position sensor
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2003 Dakota 4.7 90,000 miles-i have idling issues and the engine stalls frequently. seems like its after it rains but no check engine light. i wanted to change out the spark plugs however that seems to be a pain. it idles high so i dont think it would be the fuel pump, and sense theres no code i ruled out the tps, could a bad ground or a corroded neg. terminal cause this stalling, or maybe a dirty throttle body? any help or hints much appreciated.
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fairway
Dodge Dakota
JOIN HERE
9/01/2009
11:27:54
| RE: 4.7L throttle position sensor
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I had EXACTLY the problem described by radioactive and Msmith in
my 2001 Dakota 4.7. I replaced the TPS and the problem was
GONE. This is a quick, cheap fix and the improvement is
IMMEDIATE and PERMANENT.
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radio-active
Dodge Dakota
JOIN HERE
9/02/2009
07:40:42
|  RE: 4.7L throttle position sensor
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Replaced my TPS last night, took all of 10 minutes. No more surging at a stop, nice steady idle, no more locking and unlocking of the torque converter (at least a LOT less). Didn't reset my computer at all - never had a code. I'm a happy Dakota camper this morning! Fonash, replace that TPS, you won't regret it.
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Hat Trick
Dodge Dakota
JOIN HERE
9/28/2009
09:23:28
| RE: 4.7L throttle position sensor
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Thank you note to all dodgedakota.com posters:
I sincerely thank all of you for the great information that you take the time to share. My local Dodge dealer had no clue how to solve my high idle-surging-gear shifting problems. The problems became severe enough that I couldn't confidently drive my 2002 Dakota (111,500 miles) further than a few miles from home without worry that I would end up stranded. The Dodge dealer's solution was to charge me way too much money to "clean" a few things. With the idle and gear shifting problem becoming such a safety concern, I decided to take matters into my own hands. I thank God that I found your suggestions on dodgedakota.com. One new IAC Motor and one new Throttle Position Sensor later, both of which I installed myself in 15 minutes, have solved the problems. I went from seriously sweating a $3,000-$4,000 transmission replacement to a $150 self-perfomred complete cure. You all are the best! Please keep sharing and I will do the same.
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BlueLou
Dodge Dakota
JOIN HERE
9/04/2010
19:59:43
| RE: 4.7L throttle position sensor
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I have a 2000 Dodge Dakota with 4.7L V8 engine that developed
this exact problem at 11 years of age: when started cold, the
engine would race at about 2000 RPM, and would not idle below
1000-1500 RPM until the engine was no longer cold. From the
descriptions in this forum thread, I was convinced that the
problem was either the Throttle Position Sensor (TPS) or Idle Air
Control (IAC) valve. So I replaced them both, purchasing OEM
replacements from my local AutoZone. The TPS was $61.99, and
the IAC was $31.99 (plus tax).
Instructions were included, and replacement was easy, using
common tools (note: you will need a metric-sized socket to
remove the air cleaner, and a Torx screwdriver to remove the TPS
and IAC). I removed the air cleaner for easier access, but in
retrospect, I think that both the TPS and IAC can be replaced
without removing the air cleaner (at least on this particular
model).
The TPS and IAC are each held in place by two Torx screws. Just
remove the old units, and replace with the new ones. No
adjustment or calibration is required. The entire job required a
little over an hour. I would also recommend that you purchase
and use a spray can of carburetor cleaner. The IAC port will likely
be very dirty with heavy carbon deposits (easily dissolved by the
cleaner, however).
When I finished, my problem was solved; the engine started and
idle normally again. I don't know if it was the TPS or the IAC, but
I don't care -- it was almost certain to be one or the other. ;-)
Many thanks to everyone who contributed their experiences and
observations to this thread. This is definitely a DIY job. The parts
cost me $100, but the labor alone would probably have been a
couple of hundred (or more) at the dealer.
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