| From | Message |
The Big Guy
Dodge Dakota
JOIN HERE
7/11/2007
11:59:07
|
 Subject: 3.9 Mystery Problem
IP: Logged
Message:
Hi guys! My '96 Sport Longbed with a 3.9 me stumped. It often loses power, stalls and is then hard to restart. It occurs at all speeds without warning and then, once it's happened, will run well for a bit. It generally happens several times within a trip. At one time, the check engine light came on and a tech told me it was a low voltage error message. He reset the computer and the truck ran good for a day or two. After that, it went back to its old trick. I'd appreciate any help, as the tech says his diagnostic computer says all the sensors readings are OK.
P.S. - The check engine light has come on again, but the tech can't check it due to work load.
|
?
Dodge Dakota
JOIN HERE
7/12/2007
09:39:14
|  RE: 3.9 Mystery Problem
IP: Logged
Message:
Check that 'notorious ' splice of 3 or 4 wires
in the harness about 8 inches down from the
underhood fuse/relay box .
Drivers side fenderwall.
|
micah
Dodge Dakota
JOIN HERE
7/12/2007
22:11:09
|  RE: 3.9 Mystery Problem
IP: Logged
Message:
my 3.9 is sort of doing the same thing and i'm
having several people trying to help me. when i first start it it runs fine for a couple minutes
then it idles very low and sucks a lot of air. but then until it warms up its fine. but when i drive down the road it will start to peater out on me. i've been told compression,vaccuum, electrical,valves, and rings?? not much help but there's my problem.
|
The Big Guy
Dodge Dakota
JOIN HERE
8/20/2007
15:19:55
|  RE: 3.9 Mystery Problem
IP: Logged
Message:
I appreciate the help and other responses to my question. After changing the pick-up (in the distributor) & the MAP sensor, as well as checking the TPS (throttle position sensor) & distributor cap, it turns out that the problem was the computer. I bought one for $100 from my local boneyard (junkyard) and it's running well. I hope this helps others.
|
dddddd
Dodge Dakota
JOIN HERE
9/16/2007
04:06:33
| RE: 3.9 Mystery Problem
IP: Logged
Message:
My 95 3.9 is also stalling at all speeds and sucking alot of air when I shut it off I took it to dodge dealer and they put it on machine it said it was TPS so I got a new one swaped it out and didn't work and all they said is we don't know and it a elictrical part so no refunds lol dick heads. No codes ever. Ready to lite a match. Can any1 help before I do.
|
dakota49
Dodge Dakota
JOIN HERE
9/17/2007
20:39:34
| RE: 3.9 Mystery Problem
IP: Logged
Message:
dddddd, it sounds to me like you may have a serious vacuum leak. If you have a vacuum gauge chek the vac. when cold and when it gets warmed up. even cold it should have at least 15-17 inches of vac, generally more the better, if below 15 I would try to find a vac. leak checking the vacuum lines, and power brake booster. Sorry but thats about all I can think of for now, wish I could see what the problem acts like maybe I could be of more help that way.
Oh yeah, if it has 20 inches of vacuum, or more then you are probably ok as far as vac. leaks go. Mine runs 20 inches at normal op temp.
Good Luck
Dakota49
88 3.9 4X4 5speed
|
sayter liften
Dodge Dakota
JOIN HERE
9/18/2007
23:10:55
| RE: 3.9 Mystery Problem
IP: Logged
Message:
i had a problem with my 89 dakota, lack of power, fuel milage was ok but not great. finally found the problem, the vacuum line going to the diverter valve on the smog pump was defective where it was attached. had to replace part of the line after a fan belt broke and took it out. once it was replaced the truck runs sronger and my fuel milage jumped up and my a/c system works better.
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
