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1997 Dakota 3.9L idling problem


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slade25
User

Dec 21, 2010, 5:49 AM

Post #1 of 6 (2201 views)
1997 Dakota 3.9L idling problem Sign In

1997 Dakota auto 2wd, 3.9L V6 (175,000km)

Problem: truck is stalling out consistently now when idling and/or moving slowly in bumper to bumper traffic.
(diagnostic scanning capability not working - this is another problematic area i need to take care of)

Recent maintenance: replaced Temp Sensor, installed new spark plug wires and ignition coil.

Previous maintenance: fuel injection cleaning
transmission filter and fluid change
prior to scan problem - PO783 fault (3 -4 shift trans malfunction). Quite sure it's still there.

Performance: Truck seems to run a bit better when it's fully warmed up vice cold. It still wants to stall out however when slowing down to a crawl (at lights or in slow moving traffic) or when stopped. The only way to stop it from choking out is to put it in neutral and keep the accelerator depressed somewhat.

sidebar: at times it may also feel like the transmission might be running in second gear. When cold it struggles a little to get up hills/upgrades. Once the truck is warmed up, the "what i'm calling a possible transmission problem" performs normally. Kind of baffling at times. As well, I do not think the overdrive function is working properly.


I would very much appreciate any advice that could be offered up to try and get this truck idling smoothly and sort out the other problems.


thanks, Steve


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Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 21, 2010, 7:04 AM

Post #2 of 6 (2195 views)
Re: 1997 Dakota 3.9L idling problem Sign In

You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



slade25
User

Dec 22, 2010, 8:37 AM

Post #3 of 6 (2178 views)
Re: 1997 Dakota 3.9L idling problem Sign In

One other symptom that might be key:

the stalling out problem, when idling (or moving very slowly) almost always occurs while the transmission is in Drive mode. If it's in Park or Neutral, it seems to hang in there, albeit not quite as smoothly as it should be.

in all cases, when completeley warmed up after a spell, it doesn't always want to stall out. That occurs mainly within the first 10-15 min.

should I carry on and do as recommended above ?


anyone know of a dodge transmission Q&A forum ?


Steve

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Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 22, 2010, 8:43 AM

Post #4 of 6 (2175 views)
Re: 1997 Dakota 3.9L idling problem Sign In

You certainly won't be getting any other forum recommendations here.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



slade25
User

Dec 22, 2010, 1:46 PM

Post #5 of 6 (2166 views)
Re: 1997 Dakota 3.9L idling problem Sign In

wow, certainly didn't mean to upset anyone..................bit a comm breakdown here i think.

The transmission forum mention was in the event that I've got to go down that sad road.

My apologies Oceanside..............i most definitely appreciate yours and the advice from anyone else


Merry Christmas to you and yours.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 22, 2010, 1:51 PM

Post #6 of 6 (2162 views)
Re: 1997 Dakota 3.9L idling problem Sign In

That's like walking into a business and asking them to recommend their competition. You really don't do that.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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