12v’s should be smog exempt from what I have read, only 98.5+ 24v’s


Sent from my iPhone using Tapatalk

 

Build dates beyond Jan 1 1994 came factory with cats
It has a PCM not an ECU....I'm not aware of any updates for them
no clue on the cigarette lighter....

 

Not really sure what they are tying to learn by hooking up to the odb port, there is zero emissions sensors on that truck.

 

This is your correct answer. ^^ No OBD emissions ready values exist for the smog scanner to read. Pretty simple, really. Here in CO we do a tailpipe sniff for vehicles more than around 10 year old, IIRC. Failing you for that is totally bogus.

 

In the past my truck has always passed smog without issues.

So why don't you take it back to the places you went to then? There isn't an ECU on a 12 valve so of course the obd port doesn't read anything that has to do with emissions. You have joined the hundreds of CA residents that have been BFed by CARB. I suggest you go to the CA page and ask for an inspection point that understands that not all engines are computer controlled.

 

California requires smog on 1998 and newer

 

1998+ BUILD Date from what I have read not model year


Sent from my iPhone using Tapatalk

 

ALL 98 model year 12v cummins trucks are built in 1997. Jan 1st 1998 rolled off the line with 24v engines.

 

havent had to yet since going to the referee. he passed it for me there. when he plugged in to mine i guess it told him it didnt need the plug. he only really checked smoke and that the cat was there

 

so did you set up an appointment and he passed it at the appointment? and also if i may ask was it pricey? may just do the dirty smog if so. thanks everyone!

 

My smog guy is in Pine Valley east of San Diego. Pine Valley Auto repair 619 445 9336 ask for Juan. He is a 12 valve owner not a 98 though. This is a repair shop that works on a lot of diesels. Not a smog shop they just do a few to keep the license. He will know what you need to you. I agree with previous poster that you probably need to see a referee. It may have something to do with a recent smog machine update from the state. I know that there is nothing for the smog machine to read about emissions. I wonder thou what does a code reader see in you truck? In my truck I have all kinds of transmission codes (4500 swap) abs/brake codes (unhooked ABS, hydro- boost conv. etc...). Things like that would probably make the smog machine go ape-h-t. Or you could just sell me the truck and I would have to deal with it.

 

I wonder thou what does a code reader see in you truck?

The factory service manual spells out all the inputs and outputs of the PCM.

 

Can you explain what a referee is and where they can be found? I just bought a 1998 twelve valve that needs smog in Ventura County. The check engine light is on so I do not know where to start. Thanks

 

the referee decides if a vehicle is exempt and a few other things. unless you get lucky and they exempt it. there isnt any reason to go to them unless no smog place will pass it. you want the check engine reason fixed, the cat in place, and "stock appearing" under the hood. and maybe the egr there and working if you have a cali truck. only other thing is a smoke snap test, completely opinion of the smog tech on that if it passes.

 

Thanks for the info

 

My truck was now able to pass smog. the entire time there actually was nothing wrong with my truck. it was explained to me how the smog places were entering it into the smog equipment incorrectly, although CA is partially to blame, ultimately the only issue for my truck failing twice was the smog techs. i was able to call around and found a shop nearby that i was able to explain to him how to smog it. thank you again i really appreciate the help.

 

It is interesting to note how literally anything with fuel injection and electronic engine management (Diesel OR gas) built from around the 2000 time-frame on will pass smog - even with EGR disabled or removed. I recently proved this, and shared the official results in this post.

 

I am in Santa Paula. Do you know the name of the smog shop you used on your 98 truck 12 valve? I would like to go there first to save a lot of hassle. Thanks, Larry Manning 662-560-3018

 

mine is a federal, got it from oregon.

 

My truck is a 12 valve built in October of 1997. It has a plate on the front gear cover that states it conforms to California regulations for 1997and has obdII. I took my truck to Raul’s smog station in Santa Paula they did a visual inspection and said they could not test it because I had added a boost gauge. Truck has to be completely stock, no modifications. I took the boost gauge off and plugged the hole with the original 1/8 inch plug. Went back and they put the machine on it but failed because the egr was not ready. Drove the truck for 25 minutes at 45 mph then took it back and it passed. This engine has an egr valve that appears to work properly. So if your smog guy is a stickler for detail you will have to have a working egr system.

 

Are you serious? They sent you on your way for a boost gauge?

I don't mind having to comply with emissions, but that is ridiculous. Just test the truck. All it needs to do is pass and it shouldn't matter how it passes...

Emission stations are a peeve of mine. I really do believe half of them don't know what they are looking at/for.

 

Well, it is usually underpaid bottom feeders that work at smog places. My old 1986 w-100 failed because the tw@t that was driving it on the dyno was slam-shifting the manual transmission and causing the probe to fall out of the tailpipe. She got a nice talking to about abusing other people's vehicles.

 

mine is not a california also federal. but i would expect that to be a problem for sure unfortunately

 

I'm in the same boat with some of you here. My truck (98 12v) reg is due in april and requires smog. Truck is federal emissions compliant because it was originally sold in Montana then later brought to CA. Only part I'm really worried about is the smoke test. Tap on the pedal and it blows out. It goes away tho just as soon as it comes out but it still is completely up to the tech on if its "too much" or not.

 

Just make sure to inspect the injection pump and put it back to stock. I don't know much about the P-Pumps, but there are at least a couple of mods that will increase smoke out of those.

 

I plan adjusting the pre-boost screw tomorrow at work. I'll report back with what the adjust does for smoke. Worst part about this whole smoke test part is its totally up to the smog tech. Having a bad day=fail lol.