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jms
Dodge Dakota
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12/21/2002
20:14:03
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 Subject: Federal vs CA. emissions?
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Can anyone tell me the difference in parts between a California truck and a Federal [49 state?] trucks emissions setup? I am referring specifically to 1997 Dakota 3.9v6 4x2 pickups. I have been told not to worry, but I am a chronic worrier. I am going to [if emissions is ok] buy a 97 Dakota 3.9v6 the first week of January. However, I live in southern California and the truck was originally sold in Oregon, hence the Federal emissions.
I know that there used to be a HUGE difference in emissions equipment between 49 and 50 state vehicles. I also know that, increasingly, many manufacturers are not making 2 different models [parts-wise] any more, but are just tuning them differently. I just don't know when that began for each model, or how the non-CA 3.9 Dakotas compare to CA 3.9 Dakotas. Can anyone give me anything more specific than 'don't worry'? I would appreciate it.
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Rob454
Dodge Dakota
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12/22/2002
03:49:04
| RE: Federal vs CA. emissions?
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im in california also. You dont need to worry abotu it. they cant charge you the 300$ somg impact fee anymore. They charged me for that when i had a Dually boughtin from nevada.
Basically most cars today are the same as far as smog equipemnt is concerned. the only thing you lack is the sticker under the hood specifying the california smog sticker certification you want to make sure they DONT classify your truck as commercial vehicle but they probably will anyway they did to mine. So cal sucks for DMV fees
Rob
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sethrojam
Dodge Dakota
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1/27/2005
03:19:17
| RE: Federal vs CA. emissions?
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I own a 93' 2wd. Dakota. I currently live in Maryland but will be moving to San Diego in june. Should I have to worry about emissions issues with a truck this old going into Cal? The truck passes emissions here, but will I be up for any supprises when I move? And will registering the truck as an commercial vehicle make a differnce?
thanks,
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93dak4x4
Dodge Dakota
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1/27/2005
08:01:35
| RE: Federal vs CA. emissions?
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my truck would look like a model t to an emissions test, good thing i dont live in so cal.
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Just Looking
Dodge Dakota
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1/28/2005
13:23:20
| RE: Federal vs CA. emissions?
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yes there is a difference...
Dodge i guess had multiple emission setups.
My year was suppossed to have 4 o2 sensors and 2 cats, but it only had 2 o2 sensors and 1 cat.
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jason s
Dodge Dakota
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1/28/2005
14:41:34
| RE: Federal vs CA. emissions?
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I thought this topic had died. I'm glad it is still causing thought. I got the truck and it passed emissions testing, but it was registered as a commercial truck. I think california treats all pickups as commercial. It is kind of ironic. SUV's are considered trucks from a MPG and emissions point of view from the manufacturer, but they are considered cars by california's DMV. Pickups seem to all be considered commercial vehicles.
About a year after it passed emissions, the cat decided to fall apart on me. I changed the cat out with a new aftermarket OBDII-compliant cat [thankfully it happened then, and not a year earlier, when OEM was the only option at 2X the cost!] and I changed the muffler out.
Now, a year after that, I had to smog it again. I don't remember the original smog results, but the new test showed .01 or 0% measured emissions in a few categories, and the other categories it was at the low end of the 'normal' range. I was very impressed.
By the way, my 'federal' truck has only one cat and only 2 O2 sensors. I was wondering if 'Just Looking' is describing a dual exhaust system with the 4 02 and 2 cat's it was supposed to have [one set of cat and 2 o2 per side?]? That is the only way I can imagine a true dual exhaust system working [true in the sense the right cylinders exhaust does NOT mingle with the left]. It would also need 2 mufflers. From being under my truck I don't see how they would cram 2 cats into a single exhaust pipe in the space they have, unless both are much shorter/smaller. and I can only see a need for three O2 sensors, as it would be O2/Cat/O2/Cat/O2. Four sensors would be doubling them somewhere, and become redundant [O2/cat/O2/O2/cat/O2?].
As for the earlier generations, I would have to say I am ignorant. I do know that before the late 1990s many car makers did have significant differences in the emissions systems for Federal/49 state trucks and California trucks. I also do know many of them began to design just one emissions system for all of them [maybe with a different computer program for them, but the same equipment?] around the late 1990s to make production cheaper, but some were labeled 49state/federal and some were California emissions. My guess is that the 1993 truck is significantly different.
"Just Looking", I would be interested in knowing what year your truck is, and what engine?
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Just Looking
Dodge Dakota
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1/29/2005
19:41:19
| RE: Federal vs CA. emissions?
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Its a 2002 4x4 quad cab 3.9
I picked up a couple odd things on it that make me wonder make year sometimes...
When i say 4 o2 sensor they were set on both sides of engine exhaust and one before and after final cat.
The pre cat was the Y pipe. People are chiseling that one out and still passing emissions.(i dont know much about it myself)
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jason s
Dodge Dakota
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1/29/2005
20:57:41
| RE: Federal vs CA. emissions?
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Thanks 'just looking'. I think I can see how they were mounted [mentally]. When you say on either side of the exhaust, am I right in thinking/seeing it near the exhaust manifolds/headers? If that is the case, I can kind of see the reasons, but it still seems like a bit of overkill from the design view, since the places it makes the most sense [to me] would be before and after the cats. However, this would allow the truck's computer to see if one side/bank of cylinders was creating more emissions than the others.
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