Dodge Dakota ForumDodge Dakota PhotosDodgeDakota.net Membership
  Forums   Forum Tools
01:30:44 - 04/18/2014

V6 Dakotas
FromMessage
RTSEChal
Dodge Dakota
JOIN HERE
 Email

4/30/2002
08:49:21

Subject: Emissions Problem
IP: Logged

Message:
Hey everbody, old member from the Dakota list, just checking in with a question. I just failed the Illinois emmissions test on a 96, 3.9, 5-speed, 80,000mi. This is one of those treadmill tests with simulated driving conditions.

Looking at the output graph they give you, it looks like the emissions spike during acceleration, and at the shift points, then slowly drop off to acceptable during the cruise at speed portions of the test.

No trouble codes reported with the Check Engine light procedure, recent tune up (plugs,cap,roter,air filter...).

I have a suspicion as to the problem, but thought I'd get some collective opinions from the list.

Any thoughts?

Adam



bernd
*GenIII*
 Email User Profile


4/30/2002
09:36:39

RE: Emissions Problem
IP: Logged

Message:
What else is installed and do you have the actual printout?



1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous
14.55 @ 96.01mph

RTSEChal
Dodge Dakota
JOIN HERE
 Email

4/30/2002
10:51:34

RE: Emissions Problem
IP: Logged

Message:
This is Bone Stock, other then normal tune up items, it's as is from the factory.



GRAYDAKOTA
Dodge Dakota
JOIN HERE
 Email

4/30/2002
23:40:58

RE: Emissions Problem
IP: Logged

Message:
DO YOU BURN OIL??? IF YOU DO THEN TRY USING SYNTHETIC AND YOUR EMMISIONS WILL DECREASE!!



Jesse T,
Dodge Dakota
JOIN HERE
 Email

5/02/2002
17:23:53

RE: Emissions Problem
IP: Logged

Message:
Man that is bad, I hope that all our modded up Daks here in Tx, will pass. Mine is due in about 5 months.



greengiant13
GenIII
 User Profile


5/02/2002
17:33:00

RE: Emissions Problem
IP: Logged

Message:
you thin you got it bad... Im in Ca.

Catch me come later!!

Green Giant
Y2K 3.9 V6 Sport
Ram-Air Hood, K&N intake, Line-X bed liner, Galaxy 73 cb radio, Super Penetrater Antenna, Custom Paint, Ram-head Taillight covers . Comming soon, V8 TB, Flomaster Ex, Clear Corner Turn Signals, ......Supercharger........

kryp2nite
Dodge Dakota
JOIN HERE


5/02/2002
19:39:36

RE: Emissions Problem
IP: Logged

Message:
engine running lean/rich?



XLR8260
Dodge Dakota
JOIN HERE


5/03/2002
02:30:56

RE: Emissions Problem
IP: Logged

Message:
Have you replaced your PCV valve lately/ever?

Also, did it fail on the HC's, CO's, or NoX? Or on a combination of two/all? This is important in order to pinpoint what is going on in the system.



RTSEChal
Dodge Dakota
JOIN HERE
 Email

5/03/2002
07:31:49

RE: Emissions Problem
IP: Logged

Message:
PVC just replaced. I failed the CO and CO2 tests, not burning oil. Plugs indicated a little lean.

As I said, the graph shows spikes when the engine transitions from no-acceleration to acceleration, and at the shift points.

Based on that, I'll throw my guess out there and see if anybody agrees. My belief is that it's a worn timing chain. There's probabally enough slack in there that under high load (acceleration and re-engaging the clutch) the ECU isn't able to adjust the timing fast enough, and far enough. As the load comes off into normal cruise, the timing chain picks up some slack, and/or the ECU catch's up.

Any thoughts?



bernd
*GenIII*
 Email User Profile


5/03/2002
08:37:22

RE: Emissions Problem
IP: Logged

Message:
Sounds like a valid point RTSE (and a possible cause as well). At 80K miles i'd be a little bit worried on the timing chains as well as the plenum gasket as that will cause lean conditions as well. (Plenum gasket life expenctancy: 30-45K miles.)

After changing it out (timing chain and/or plenum gasket), have the injectors cleaned...and not just the stuff in the tank either.


1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous
14.55 @ 96.01mph

XLR8260
Dodge Dakota
JOIN HERE


5/04/2002
01:11:28

RE: Emissions Problem
IP: Logged

Message:
Good luck, have fun!



Jeff
Dodge Dakota
JOIN HERE
 Email

5/05/2002
19:43:15

RE: Emissions Problem
IP: Logged

Message:
Doesn't Illinois have a maximum dollar limit on repairs to fix emissions problems? If your truck is totally stock and all emissions hardware is intact, are you allowed 3 chances to pass the emissions test? Was your engine hot when the test was performed (did your Dakota sit for a long time before the emissions test was actually run)?



LI Blackdak
Dodge Dakota
JOIN HERE
 Email

5/05/2002
23:24:11

RE: Emissions Problem
IP: Logged

Message:
my ass has an emmissions problem



   P 1


Post a reply to this message:

Username Registration: Optional
All visitors are allowed to post messages


Name:
Email:
Notify me when I get a reply to my message:Yes  No

Icons:            

Subject:
Message:
 



Home | Forums | Members | Pictures | Contact Us

This site is in no way affiliated with Chrysler or any of its subsidiaries.