Emission.....help!

[ZeroGravity58]

well i got the paper in the mail today....The truck is due in for emissions by january 2nd. I need some ideas to get this things to pass. Yes it does have a cat converter on it. Is there anything else i can do to get it by. Or should i try to get an extention.

[ymyhere]

Fresh oil, new air filter and pour in a couple bottles of dry gas. Run it hard and keep it hot when you get there and give it a shot.

[gbaronetXCR]

I tried many things... additives, hot.cold etc..

What worked?, Back your timing down a few, 5 worked. Tried with just a Cat, helped still failed. Added an Egr intake and jetted down. To the point I had lean pop if getting on it. 2 or the three recording I showed 0. Was way under.

Not sure what Maryland is like , ours is fairly strick up here.

I see plenty of v8 s trucks for sale up here.

When you ask why, it\'s because they can\'t get a licence because they failed to pass.

Figured it would help my resale when I was ready to sell.

[ZeroGravity58]

maybe i will jet my carb way down and see how i come up. I dont have a EGR intake. I will take the timing down and rejet it. I still might try for an extension tho.

[BewstAdd1ct]

Id just go, and if you fail, post the readings and ill tell you what you need to pass.

[ZeroGravity58]

alrighty, i think im going to go if i cant get alittle of a extention first.

[brian1569]

In Pa if your truck is under 5000 miles you can get a sticker with nothing being checked. You can always try going to Pepboys and show them a $20 or more and you probably can get one.

[ZeroGravity58]

i dont think they do that in maryland tho...

[Doug]

Pull your pvc valve from the rocker cover and retard your timing a couple degrees. Doing these help.



Doug

[afghanimobilerawks]

ok, in ontario, i knwo you need everything that was stock in that truck for that year. if it had a egr, you must have an egr... etc. but you dont have to use a efi engine in a vehicle that was originally efi.... when it gets brought in to get done, they put it under hot rod. it might be the same or similar where you are...... then again could be completelyy different

[BewstAdd1ct]

On 2004-11-23 22:51, Doug wrote:

Pull your pvc valve from the rocker cover and retard your timing a couple degrees. Doing these help.



Doug





depending on where its at, retarding the timing may cause a jump in CO output, and unplugging the PCV will cause the truck to go a bit lean. overadvanced timing will cause a fail for HCs, and if you havent changed your oil and its saturated with fuel vapor, itll get pulled in throught the PCV valve and show as high COs. dont start putting band-aids on the problems, fix them correctly.



do they do roller dyno smogs in maryland (IM240)?

[s10w]

yea they do but sometime they wont put your car/truck on there if its high performance because they blew a few up

[ZeroGravity58]

yea they do dyno test. Right now my truck is at 18 degrees intiail timing in gear. I dont have an EGR or a provision for one on the new intake. I do have a charcoal can and a cat.

[gbaronetXCR]

Ont.. motor changed puts you into a hotrod class.. really means about a 1980 standard. By then Egr\'s were in. Will not pass without, only way to keep the NO\'s down. We tried a reaidng befroe and after the CAT\'s as well,would have passed without them. Muffler shop would not let me put on duals without them in place.

The treadmill test is manditory except for Deisels. Then run about 30mph for a few minutes.

[ZeroGravity58]

does the EGR wont make that big of a diffrence will it? my 4.3 never had an EGR valve just to block off plate and it passed emissions.

[gbaronetXCR]

on a carbed V8 is dis... O2 sensor on a fuelie helps metering .

Local muffler shop had my truck for 4 days tring differant things. They had a list of folks that could\'nt pas.. I was a test case. They ran it with a Bear Gas probe unit . Took 26 test runs to get it. This is on a mild V8 with a 600 holley.

[ZeroGravity58]

i dont have a O2 sensor...Here in maryland if you fail twice and get a slip saying that you had $400 worth the work done they pass you.

[afghanimobilerawks]

gbaronet, chances are they wouldnt let you go without the cats because its under federal law that you must have them if your car came stock with it......

[BewstAdd1ct]

they wouldnt let him go because its illegal for a repair shop to touch the exhaust from the cats forward, and arent allowed to perform a repair on a vehicle with faulty exhaust emissions equipment, meaning cats and the pipes thereforward.

[fastw23s]

Personally, not having to deal with this, I would lower your timing to a total of 32-34, remember you must burn the fuel.



Then I would lean the idle as much as you can, then I would drop 2 jet sizes for your running #s.



Then if at all possible, I would try to hook up some type of air pump into your exhaust, if you have headers, you can do like a evac kit, but run tubes off the air pump, you should be able to make an air pump work if you get one off of a Chevy V-8.



The factories did this for a reason. Earlier Malibus had them, maybe even an older V-6 S-10, or van. That will def. dilute your #s.

[ZeroGravity58]

i thought about doing the airpump. I just donw know where is mount it at. I thought about running it directly into the Cat.

[afghanimobilerawks]

most air pumps (like th ones on the carbed v6 s10\'s) seem to run into the headers........

[LT1Blazer4x4]

perhaps you could try G2P ( garunteed to pass ) it worked for me. they will refund your money if you dont..

[BewstAdd1ct]

running into the headers os for cold start only, youll get a bit of exhaust popping if you run like that all the time. smog pumps usually run right into the oxidation bed of the cat for warmed-up operation.



and its really not to dilute the mix, as you would need a bit more than an air pump to do so, its to help the oxidation bed split HCs and COs in to H2Os and CO2s.



seriously, if you can get readings from a sniffer at idle and 2500, you can get a pretty good idea of what needs to change to pass...

[ZeroGravity58]

i may take it once and see if it fails...then i will know what i need to do to pass the next time. emissions really sucks for people that want to hotrod....

[BewstAdd1ct]

move out of MD... :p

[ZeroGravity58]

well i went today...here are the state standards for my truck...220PPM for HC...1.20 PCT for CO...60. PCT for CO2. I had..387 PPM for HC...6.74 PCT for CO...and 7.75 PCT for CO2. But i found out i can keep it on the road as long as i take it back everymonth to get it retested, so im not totaly screwed http://www.s10v8.com/images/smilies/icon_smile.gif

[chris-350]

YOU THINK YOU GUYS HAVE IT BAD, I LIVE IN CALI WHERE EMISSION LAWS SUCK ASS!!! WORST THAN ANY OTHER STATE.

[ZeroGravity58]

i know cali is terrible about everything

[chris-350]

yeah, but its nice speeding down the 101!(PACIFIC HI-WAY!)