fivestarsi

Everything passed easy except for the
NO part. (Nitrous Oxide) I passed the 25mph test but failed by 38 points on the 15mph test. I have no check engine light or anything, and I have high miles about 162,000 so Im guessing I might have a lot of carbon build up. Is there any additives you guys recommend to try and clean up some carbon build up? Car has fresh oil and spark plugs. If additives dont work I might try changing the egr valve. But rather try a cheaper route first. Thanks Guys

ParaSurfer1979

Sea Foam bro. Check it out on youtube, If you dont know how to use it, find someone to do it for you but i told a 16yo little bud about it and he video'd it. It performed just as it should,

fivestarsi

How soon after I use the seafoam can I take it back to the smog station?

Aman

Probably after 50-100 miles after treatment to get it all out. Don't forget to change your oil after

tmnhs81

What are the other numbers looking like. Post them up if you can. Maybe I can help you out.

Are you in California? How was the weather when the test was run? Was the car fully hot? Failing for Nox at 15 and passing at 25 for same thing is usually because technicians don't warm up the car (applies mostly to Catalysts) properly. Don't just start dumping that seafoam in there. Post up the numbers for Nox and HC for both 15 and 25 MPH.

ParaSurfer1979

btw what do you drive?

tmnhs81

Me? or the other guy? Mine is in my sig and he drives a 96 2.5TL.

ParaSurfer1979

This is a great how to vid on seafoam.
http://www.youtube.com/watch?v=F0isyGBCngY

ParaSurfer1979

The OP. He never stated what car he had.

ParaSurfer1979

This one is good as well. Its in HD so if you have hi-sprrd internet set the movir to 730p in youtube.
http://www.youtube.com/watch?v=OVoUR...eature=related

tmnhs81

Well, why not just get other number first then go from there? I betcha its most likely cold catalyst.

nutnut

http://www.megamanual.com/ms2/tune.htm#emissions

TexasHonda

High NOX usually results from inadequate EGR (exhaust gas recircultion). This happens due to blocked passages in the EGR manifold passages and ports into the intake manifold. Clean and you should be good. Easy on 2.5TL, but much more difficult on 3.2TL. Check DIY's and search for detailed procedure. I remember one for removing intake manifold that was good.

good luck

Go90go

^ I second Texas. Get a few cans of brake parts cleaner, a long sharpened flathead screwdriver, a wire brush, and some time. Usually the culprit is the pipe, then the EGR chamber which the pipe leads to on the intake manifold. The carbon buildup there was horrendous on my Type II manifold, surprisingly clean on my 3.5 manifold, and OK on my Type I.

~Cheers~

fivestarsi

Im in california. I drove car for about 45min before i took car to get tested. H[IMG]file:///C:/Users/lilzeke/Desktop/IMG_1610.JPG[/IMG]eres[IMG]file:///C:/Users/lilzeke/Desktop/IMG_1610.JPG[/IMG] the numbers.

http://s173.photobucket.com/albums/w...ve/smog%20pix/

I couldnt figure out how to post pix, but heres a link to see the pix. Hope it works.

fivestarsi

I have a 96 2.5 tl

tmnhs81

After looking at the numbers I want to say that go with TexasHonda. Its clogged EGR port.

fivestarsi

Which parts do i take off and clean? I tried to find a do it yourself but couldnt find it for the 2.5. a lot of threads said it easy to do on the 2.5 so thats a plus.

TexasHonda

http://www.acuraoemparts.com/delray/...All&vinsrch=no

Part 17 is removed to access ports and channels to be cleaned. If you can't find this, better get help.

good luck

desired_speeds

EGR. careful with seafoam, that shit friend my 02 sensors last time.

fivestarsi

I used a bottle of this lucas fuel treatment, it said it would dramatically lower NOx emissions, so I tried it and it help me pass!!!!

Go90go

That's great, but you should still clean out the EGR pipe. Here's a pic from the Type II I mentioned. This is the chamber:


~Cheers~

fivestarsi

geez!! How did your car run after you cleaned all that out? Did you notice any difference in performance? MPG?

justnspace

iTrader: (1)

whoa.

Go90go

This was a manifold I had picked up so it was never on my car in this condition. The differences in response and performance were due the the design itself, so it's not valid here.

The carbon was so black, I had trouble taking pictures of it. My phone wouldn't focus on it!


It came with free oil.


~Cheers~

fivestarsi

Should I remove the intake manifold when cleaning?

TexasHonda

No, only the small EGR distributiion manifold atop the intake manifold.

good luck

fivestarsi

Great, Thanks again for all the advice.

Go90go

Yeah, no need to clean out the entire thing. I did it on this one because it was off the car already, and it was extremely dirty both inside and out.

~Cheers~

dave_ramkumar

iTrader: (5)

DAM, thats some nasty build up

Go90go

Yeah, it's not normal, either. For the mileage on the car, I'd say the guy used shit gas and shit gas only.

I have to say, though, the feeling I got after getting out most of the sludge was a good one.

~Cheers~

TexasHonda

Gasoline does not cause EGR buildup. It results from exhaust gas vapors condiensing on colder passages. Fix is to keep it hot, which took Honda/Acura a long time to figure out apparently. A lot of short trips might cause builidup to occur more rapidly.

I've not heard of this problem w/ other manufacturers to the extent of Honda/Acura.

good luck

Go90go

Texas, could it be coincidence, then that on my original motor, which I knew to have been run on horrible gas for more than half its life, and was driven on the freeway almost exclusively, had more buildup in the chamber than my new motor, which was only a city car sipping Chevron and Shell Supreme?

~Cheers~