Go Back  DodgeForum.com > Dodge Trucks > Dodge Dakota > 2nd Gen Dakota Tech
Reload this Page >

California vs Federal emissions

2nd Gen Dakota Tech 1997 - 2004 Dodge Dakota Tech - The ultimate forum for technical help on the 2nd Gen Dakota.

California vs Federal emissions

  #1  
Old 05-15-2019, 02:15 PM
Aaron H
Aaron H is offline
Registered User
Thread Starter
Join Date: Feb 2019
Posts: 19
Default California vs Federal emissions

Iím swapping my 3.9 which is California emissions for a 5.9 which is federal emissions in my 03 dakota. Will this be a problem? do i get a california or federal ECU, wiring harness etc. If anyone can help me that would be greatly appreciated
 
  #2  
Old 05-15-2019, 02:25 PM
HeyYou's Avatar
HeyYou
HeyYou is online now
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 56,803
Default

You are going to have to set it up with the california emissions..... So likely two cats, four O2 sensors, and heaven only knows what else.....
 
  #3  
Old 05-15-2019, 02:36 PM
Aaron H
Aaron H is offline
Registered User
Thread Starter
Join Date: Feb 2019
Posts: 19
Default

Originally Posted by HeyYou View Post
You are going to have to set it up with the california emissions..... So likely two cats, four O2 sensors, and heaven only knows what else.....
The 5.9 is going into a california emissions vehicle so it already has all of that, i was just wondering if iíd have to change anything because the engine is from a federal emissions vehicle
 
  #4  
Old 05-15-2019, 02:52 PM
HeyYou's Avatar
HeyYou
HeyYou is online now
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 56,803
Default

Now, I am not 100% sure on this... but.... If the down pipes from the 3.9 (which is where I assume the cats are) line up with the 5.9 exhaust manifolds...... I think you can just add the two additional injector circuits to the existing wiring, extend any wiring that won't reach where it needs to be, and have the PCM flashed with the 5.9 cali emissions tune, and you *should* be all set. I don't think anything externally on the motor was different, but, I haven't seen one either. Does your 3.9 have EGR? An AIR pump?
 
  #5  
Old 05-15-2019, 05:45 PM
Aaron H
Aaron H is offline
Registered User
Thread Starter
Join Date: Feb 2019
Posts: 19
Default

Originally Posted by HeyYou View Post
Now, I am not 100% sure on this... but.... If the down pipes from the 3.9 (which is where I assume the cats are) line up with the 5.9 exhaust manifolds...... I think you can just add the two additional injector circuits to the existing wiring, extend any wiring that won't reach where it needs to be, and have the PCM flashed with the 5.9 cali emissions tune, and you *should* be all set. I don't think anything externally on the motor was different, but, I haven't seen one either. Does your 3.9 have EGR? An AIR pump?
Iím not sure if i have one, i already pulled the 3.9. but I do have a 03 durango 5.9 pcm but it is federal emissions, you think that can be tuned for california emissions?
 
  #6  
Old 05-15-2019, 06:04 PM
HeyYou's Avatar
HeyYou
HeyYou is online now
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 56,803
Default

I can give you a definite 'probably'. So far as I know, the only difference between the ECM's is the programming. All the pinouts are pretty much the same. For Cali emissions, I think there are just more O2 sensors to pay attention to. (and not to neglect the extra cat?)
 

Thread Tools
Search this Thread
Quick Reply: California vs Federal emissions


Featured Sponsors

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: