emissions trouble

[pb_beaker]

Well i failed emissions for the second time today and dont know where to start. Here is what i had:

MINE STANDARD
hydrocarbons 3.22 3.00

carbon monoxide 45.25 25.00

oxides of nitrogen 4.16 4.50


I gues 1 out of 3 isnt bad. And i also passed the gas cap test.....FINALLY!!!:laugh3: This is for a 86 2.5 if you were wondering.

[x*BIGASSALEX*j]

Well i failed emissions for the second time today and dont know where to start. Here is what i had:

MINE STANDARD
hydrocarbons 3.22 3.00

carbon monoxide 45.25 25.00

oxides of nitrogen 4.16 4.50


I gues 1 out of 3 isnt bad. And i also passed the gas cap test.....FINALLY!!!:laugh3: This is for a 86 2.5 if you were wondering.

oldest trick in the book....

run your gas to quater of a tank and pour a bottle of rubbing alcohol and go back, you will pass for sure....

Now if you want to spend a few more bucks, go to any auto store and buy- "Gauranteed 2 Pass". It will run you about 8-12 bucks....pour it in at about a 1/4 left, burn the gass and fill it back up with 91 octane, i have heard 87 is ok but 91 will burn better....she will pass for sure....I did:lecture:

[pb_beaker]

thanks for the info, i will definately give it a try. But just to satisfy my curiosity what would cause this and what could i do the fix it.:dunno:

[Evil88]

check your states DMV website. It should have something that helps. I know Cali DMV website offers an interactive PDF file that explains everything.

[AZRockRunner]

my 90 has 302,xxx miles on it and I usually run 1 can of Seafoam through the vacuum hose off the booster and then another can in the gas tank just before emissions. I pass so low, that last year they moved me over to another lane and retested to make sure it was not a malfunction.
Warning: do the seafoam through the vacuum line WAAAAY out of the range of neighbors. It will produce ALOT of thick white smoke from the tail pipe as it burns off all the carbon.
Also it helps to do a fresh tune-up and oil change before going back.

I had a chevy celebrity a few years ago and it failed. i changed the oil and it passed with flying colors.

Good luck.

[pb_beaker]

where can i get this seafoam at?

[Wounded XJ]

I say it is time to move to Northern AZ. Your XJ can exhale all the bad fumes it wants to since we have no emission here.:smoker:

[pb_beaker]

yes i know, got the jeep from Flagstaff from my father in law, should of left it registered there!:looney:

[pb_beaker]

what would cause high carbon monoxide? I have read that the egr valve causes high nox gases, but not much on the monoxide. Any advise.

[AZRockRunner]

Seafoam can be purchased at your local AutoZone. Hope you have one of those. Otherwise look around your local autoparts stores. Its in a white can with red lettering.

[AZXJ]

Check PCV system, EGR valve and all vac lines. A tune up and a new fuel filter and air filter will also help things run smoother. Have you replaced the cat since it lived in the higher elevations? If not, then I suggest you do so as well..
The fuels that are avial in higher elevations of arizona are non oxigenated and this means more crud stays in the cat after the fuel is burned off.

my 2 cents.. :D

[AZRockRunner]

Check PCV system, EGR valve and all vac lines. A tune up and a new fuel filter and air filter will also help things run smoother. Have you replaced the cat since it lived in the higher elevations? If not, then I suggest you do so as well..
The fuels that are avial in higher elevations of arizona are non oxigenated and this means more crud stays in the cat after the fuel is burned off.

my 2 cents.. :D

Where did you get .02 cents??? I wanna find that money tree. LOL
:wow:

[AZXJ]

Check your CC statement.. :rtm:

[AZRockRunner]

:eyes:

[AZXJ]

:spin1: :cheers: :spin1: :cheers: :spin1: :cheers:

[CrashSomers]

I could not pass when i got my xj. And I found out that the county I lived in had a program that helps pay for repairs. I got over $600 dollars worth of work paid for by county. Your taxes hard at work .... Call the emissions shop or look at the paper work they gave you see if you can use that program or have it available. Hope it helps.

Crash

[pb_beaker]

oldest trick in the book....

run your gas to quater of a tank and pour a bottle of rubbing alcohol and go back, you will pass for sure....

Now if you want to spend a few more bucks, go to any auto store and buy- "Gauranteed 2 Pass". It will run you about 8-12 bucks....pour it in at about a 1/4 left, burn the gass and fill it back up with 91 octane, i have heard 87 is ok but 91 will burn better....she will pass for sure....I did:lecture:

Well the rubbing alcohol did not work, now i will try the gauranteed 2 pas.s, if that fails i guess i will have to get it registered up in flag.:doh:

[Running Project]

possibly the o2 sensor and the CAT!. also test the charcoal canister just all variables to the crapy emissions law in this stupid state.

Also The sea foam works great so does the rubbing alcohol. I suggest to run injector clearner through it before you go down as well. Use lucas oil injector cleaner, about 4 bucks at autozone.

[x*BIGASSALEX*j]

Well the rubbing alcohol did not work, now i will try the gauranteed 2 pas.s, if that fails i guess i will have to get it registered up in flag.:doh:

what part did you fail after pouring the alcohol? Did you see a difference compared to the first one? How about your gas tank cover, is it old and coroded? If it is you might want to buy a new one......

Can you scan both results and post them, that can tell us what you need to fix?

[pb_beaker]

no scanner but i hope thise helps.http://i197.photobucket.com/albums/aa79/pb_beaker/napaandjeep038.jpg

[AZRockRunner]

have u tried the seafoam yet? That stuff is awsome man.
my local checker is carrying it now. WOOHOOO!!!

[pb_beaker]

yes i did, i ran 1/3 pint straight through the carb, did not see very much smoke. i then put a bottle of rubbing alchohol into 1/4 tank of gas and the above result was what i had. When i got home i drained the gas tank and poured the rest of the seafoam into the gas tank and reved the engine till it ran out. I did see alot of white smoke. I now have a bottle of G2P and am going to run that through with 1/4 tank of gas then add 91 octain and try it again!!!!!!!

[pb_beaker]

i just came accross something interesting..... I dont think i have a cat!!!!! my exhaust goes straight from the engine to a muffler and thenb out. This jeep was made for elevations above 4000 ft. Should it have one?

[Mdub]

i just came accross something interesting..... I dont think i have a cat!!!!! my exhaust goes straight from the engine to a muffler and thenb out. This jeep was made for elevations above 4000 ft. Should it have one?

Oh yeah Bro, you need a Cat. Huge part of emissions control:

The Reduction Catalyst
The reduction catalyst is the first stage of the catalytic converter. It uses platinum and rhodium to help reduce the NOx emissions. When an NO or NO2 molecule contacts the catalyst, the catalyst rips the nitrogen atom out of the molecule and holds on to it, freeing the oxygen in the form of O2. The nitrogen atoms bond with other nitrogen atoms that are also stuck to the catalyst, forming N2.

The Oxidization Catalyst
The oxidation catalyst is the second stage of the catalytic converter. It reduces the unburned hydrocarbons and carbon monoxide by burning (oxidizing) them over a platinum and palladium catalyst. This catalyst aids the reaction of the CO and hydrocarbons with the remaining oxygen in the exhaust gas.

The Control System
The third stage is a control system that monitors the exhaust stream, and uses this information to control the fuel injection system. There is an oxygen sensor mounted upstream of the catalytic converter, meaning it is closer to the engine than the converter is. This sensor tells the engine computer how much oxygen is in the exhaust. The engine computer can increase or decrease the amount of oxygen in the exhaust by adjusting the air-to-fuel ratio. This control scheme allows the engine computer to make sure that the engine is running at close to the stoichiometric point, and also to make sure that there is enough oxygen in the exhaust to allow the oxidization catalyst to burn the unburned hydrocarbons and CO.

[pb_beaker]

so then can i go down to the local junk yard, pick up a used cat and weld it in?:passgas:

[sjkimmel99]

High carbon monoxide = running rich. High hydrocarbons = incomplete combustion, possibly also from running rich. High NOx from lean conditions or too hot combustion chamber temps which you do not have (high NOx that is.)

So look for causes of running rich. Does the vehicle warm up enough to get the computer into closed loop mode? You don't have a 160 or 180 thermostat do you?

Don't know if your year has an intake temp sensor but sometimes people play games and relocate that sensor to the airbox from the mainfold to make the cpu think the air temp is low so it adds more gas for a richer mixture. You haven't done that? Or that sensor, if you have one, is bad?

What else would cause it to run rich? Clogged air filter? Bad O2 sensor as someone else said.

This site has some other suggestions:
http://www.wivip.com/fs_motorist.html?m_vehiclefailed.html

[x*BIGASSALEX*j]

Oh yeah Bro, you need a Cat. Huge part of emissions control:



Major part, go to a muffler spot, they usually have some and they are not that expensive. or hitting a junk yard or brand new, :eyes:

[AZRockRunner]

Major part, go to a muffler spot, they usually have some and they are not that expensive. or hitting a junk yard or brand new, :eyes:

Weird thing is that there area alot of people that pass without a CAT. Anyway, I dont think I would get a used one that has been sitting in a junk yard for god knows how long. Alex is right, there not that expensive.

Brian

[Running Project]

yeah man CATs are needed down here in the lovely valley. Go to pick a part in mesa ( they have three jeeps there) you might be lucky and walk out with a whole exhaust system.

[Oizarod115]

my 90 has 302,xxx miles on it and I usually run 1 can of Seafoam through the vacuum hose off the booster and then another can in the gas tank just before emissions. I pass so low, that last year they moved me over to another lane and retested to make sure it was not a malfunction.
Warning: do the seafoam through the vacuum line WAAAAY out of the range of neighbors. It will produce ALOT of thick white smoke from the tail pipe as it burns off all the carbon.
Also it helps to do a fresh tune-up and oil change before going back.

I had a chevy celebrity a few years ago and it failed. i changed the oil and it passed with flying colors.

Good luck.

can you elaborate on how to do the seafoam through the vacuum system?

[AZRockRunner]

Well, its actually pretty easy. You start the engine and remove the large vacuum hose from the brake booster and pour half the can into the hose slowly. It should kill the engine about half way through it. If not then shut the engine off and let it sit there for about 5 minutes. Restart the engine and run the rest of the can through there. Take another can and dump it into the gas tank and fill up with good gas. I do this every few months or so and mine runs good.

Good luck

[LR_2000_XJ]

:moon::passgas::explosion:shiver::looser: :doh: :wierd::smsoap::passgas::wierd: Sorry this is just my frustration on So. Cali. smog regulations. I live above the smog in the high dez for cryin out loud!!