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Ken S
Dodge Dakota
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6/02/2009
12:50:19
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 Subject: Not Starting and Jerking
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I have had a problem that occurs every once and a while. When I try and crank up, sometimes it will not stay cranked. It starts, but usually dies. I can finally get it cranked if I press the gas while cranking, but would have to keep the rpm around 2k to keep it going. If I let off the gas, it would just die. After about 20-30 sec of pressing the gas keeping it at 2k it will even out and stay cranked.
I've had that problem off and on. Maybe once a month or less for about a year and a half.
I just started having another symptom thats somewhat similar. After shifting into drive or reverse, and barely let off the brake where I'm barely moving, it starts to jerk, not really acting like it's going to die, but just jerking. But after you start driving at higher speeds, it's fine...
If anyone has a guess at what this could be, or have had this problem before, PLEASE HELP ME OUT! Any help/opinion would be great!
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ten ten
Dodge Dakota
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6/02/2009
15:44:19
|  RE: Not Starting and Jerking
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Talk to STS he loves jerking
others more them himself!
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kamdak
Dodge Dakota
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6/03/2009
15:29:23
| RE: Not Starting and Jerking
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I'm having a similar problem. My vehicle won't start unless I give it a little fuel (1998 Dakota SLT RWD), and won't stay running unless I give it fuel (at around 2K RPM for about a minute or two, and slowly ease down the RPMS. It's weird. I'm thinking it might have to do with fuel/air sensors myself, but I'm far from a mechanic. I was told a couple things that it could be the computer unit, or a fuel enrichment sensor. Any ideas?
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Kowalski
GenIII
6/03/2009
17:31:53
| RE: Not Starting and Jerking
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Sounds like you two have a similar problem - how old are your batteries ? The PCM in our Dakotas is particularly sensitive to low voltage. One of the first signs of this is loss of idle memory - usually before you will notice slower cranking. Once you keep it reved up a little, it relearns the idle and the alternator brings the voltage up. I've seen this twice with mine now, and both times, a new battery was the cure. Perhaps the jerking is related ?
Lead, follow, or get out of the way
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Ken S
Dodge Dakota
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6/03/2009
23:01:07
| RE: Not Starting and Jerking
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No, I started having this problem, Had the fuel system cleaned and had to get a new battery a little later on, and it still does it. I'm thinking it has to be one of those sensors for air or something...Any other thoughts?????
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daddio
Dodge Dakota
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6/04/2009
06:12:06
| RE: Not Starting and Jerking
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Ken, have you checked for any codes?
Have you cleaned the Throttle Body or IAC(Idle Air Control)?
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?
Dodge Dakota
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6/10/2009
13:11:50
| RE: Not Starting and Jerking
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Message:
Possible O2 sensor (the one in front of the cat )
How is fuel mileage ?
Or , have either of you cleaned the
Air Intake Control ? - back of throttle body
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Ken S
Dodge Dakota
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6/10/2009
18:44:44
| RE: Not Starting and Jerking
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I need to get a haynes Manual for this thing. So I'll know what the heck ya'll are talking about.
It hasn't thrown any codes. Or at least the check engine light hasn't come on.
They did say something a while back about the cat getting 'bad'. I didn't realize a cat could cause those kinds of problems. The cat was replaced when I bought the truck about 3 years ago. It had about 34k miles on it when I bought it. Do I need to check the cat converter? how would I do that w/o paying a bunch of money for someone to look at it?
Fuel Mileage is still good(normal) 16-18MPG.
I will get a haynes manual, or look some of this stuff up online and see where it all is to check it...or do what I can...
NOTE---it does it more(not able to start) when it's been sitting a couple of days or sometimes just overnite.
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hey
Dodge Dakota
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6/10/2009
19:18:56
| RE: Not Starting and Jerking
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"it does it more(not able to start) when it's been sitting a couple of days or sometimes just overnite"
possible leaking injector/injectors
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daddio
Dodge Dakota
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6/10/2009
20:36:43
| RE: Not Starting and Jerking
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Ken, what year is your truck? And ahve you checked for codes? it can have a code without the MIL being on.
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Quicklimegirl
Dodge Dakota
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6/10/2009
21:01:43
| RE: Not Starting and Jerking
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I just started having a somewhat similar problem on my '88 Dakota last week. One guy thought it was vapor lock, and it almost seemed like it at first. I'd removed the gas cap & then put it back on, and was back to normal. That is, until I went back outside an hour later, the problem returned. Mine was a VERY rough, erratic idle, and I couldn't keep it running unless I revved it up. I have no tach but I estimate at least 2k before it wouldn't die.
I hadn't tried starting it up for a few days, because I was pondering what to do. I just went outside, and thought, hmmm, If I can keep it running enough to get up a hill about 1 mile from my house I can get it to a friend's shop.
However it started right up ok about 3 times in a row. Another guy suggested O2 sensor as a possibility, but why would it only do this intermittently? BTW the day this happened was fairly warm out, probably > 80F.
TIA,
Judy - Vancouver, WA
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Ken S
Dodge Dakota
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6/13/2009
08:50:58
|  RE: Not Starting and Jerking
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Since everyone is saying there's probably a code to check(even if there's no check engine light on), and/or the 02 sensor, I'm going to check those out.
I didn't give the specs of my truck in the first post:
99, V6, 3.9, 4wd
Thanks for all the help Ya'll.
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rp2004
Dodge Dakota
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6/13/2009
13:52:07
| RE: Not Starting and Jerking
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Message:
Same thing happened on a 97 w/V6 and it was a vacuum leak. I don't remember which hose/fitting was the culprit but that is where i would start looking.
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Ken S
Dodge Dakota
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6/14/2009
22:20:49
| RE: Not Starting and Jerking
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Message:
Thanks...vacuum leak.
how would you check for that, or have someone check that???
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Freebz
Dodge Dakota
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6/25/2009
09:51:22
| RE: Not Starting and Jerking
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Message:
My 99 V6 Dakota did this, seems to happen if
you let off of the key too soon while starting.
If you reset the PCM by lifting a battery cable
it will run fine. Sounds like a programming
problem to me.
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Ken S
Dodge Dakota
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6/25/2009
10:34:21
| RE: Not Starting and Jerking
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Message:
Thanks, I'll try that with the battery.
I have a feeling it's something to do with pressure, because it will jump a couple of times at highway speed when going up a hill or accelerating.
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mattlokota
Dodge Dakota
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6/28/2009
09:55:23
| RE: Not Starting and Jerking
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get someone to check your brake booster i had the same problem with my 98 v6 when you let of the brake it just wants to take off.. i started having this problem after it sitting at the body shop here..i ordered the brake booster after an hour investigating the problem with my power mech teacher and after replacing it the problem is gone but because of it the trans is slipping at high speeds so im waiting on a new trans now
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Ken S
Dodge Dakota
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6/28/2009
17:19:52
|  RE: Not Starting and Jerking
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Message:
Thanks for all the help. I'm going to look into a pressure leak, or an 02 sensor.
Again, THANKS FOR ALL THE HELP...any other thoughts, please let me know.
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Angelita beda
Dodge Dakota
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9/22/2011
12:37:14
| RE: Not Starting and Jerking
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Message:
my 98 dodge dakota sometimes starts on it own and sometimes i have to give it a little gas also it sometimes jerks while driving i replaced the idle sensor it still does the same thing what could it be.
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mattlokota
Dodge Dakota
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9/23/2011
07:09:09
| RE: Not Starting and Jerking
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Message:
Have your timing
checked my 98 started
to have a similar
problem when it sat
for more then an
hour.u would have to
give it gas but if it
was driven for a while
it would run fine it
turns out that due to
aggresive driving
habits ithe
distributor had spun a
little causing timing
to be slightly
advanced. Which when
it was cool caused it
to not want to start
but once it was warm
it ran fine
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daddio
Dodge Dakota
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9/23/2011
08:27:13
| RE: Not Starting and Jerking
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Message:
Timing is controlled by the PCM. turning the distributor will only affect the injector sync. Angelita, is it hard to start when it's cold. Have your battery load tested. A weak battery can still start the engine but it can cause the PCM to lose it's idle memory and the engine would not idle on it's own until the battery volatge comes back up enough.
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