well heres my numbers I dont have a scann so I gonna do best i can

mph__rpm__c02___02____hc_____________cco__________ _no
____meas__meas__meas_max_ave____meas_max_ave__meas _max_ave_meas
15 1826 14.1 0.5 142 31 146 .86 .10 .76 873 237 1855 fail
25 2036 14.8 0.3 117 20 88 .76 .09 .33 812 199 805 pass


well there is the results from my car and I have a AEM cai and a dc sports 4-2-1 header and have brand new o2 with high flow cat....I was think of putting a big stock cat back in and running race gas thinking that will lower the NO...but if there some smog techs here that can tell me what to do that will be much help...cause I have sohc ZC in it and finally found a shop to smog it got hopes up to pass but didnt lol...so thanks in advance for replys


Modified by yz125rider21 at 12:34 AM 6/23/2006


Modified by yz125rider21 at 12:36 AM 6/23/2006


Modified by yz125rider21 at 12:36 AM 6/23/2006


Modified by yz125rider21 at 2:31 PM 7/21/2006

 

Your smog tech did not warm-up the cat enough. That is all. High flow cats take a little warming up.

Tell him that he needs to warm it up at 2000rpm for 1 minute just before he goes into the test.

 

it was warm trust me its 105 here lol...plus i driving it for awhile before i brought it in...any other advice man?

 

Change your PCV Valve and change the oil.

I have an 88" CRX and it passed at the 25MPH test and failed by almost twice the level on the 15MPH.

I changed the O2 sensor, and I replaced the totally clogged up PCV Valve, and I changed the oil. IT passed no problem after that. THe only thing you have not done is the PCV. If the PCV is clogged then you will be blowing excess oil by the rings to get burn in the engine and blown out the exhaust.

Chances are if you have oil seaping around your valve cover and distributor, then you have a bad PCV valve, mine was totally clogged with Carbon. $3.99 at autozone.

Good Luck

 

well I replaced that awhile back but i go check that right now...heres my plans cause I get one free retake for smog...I gonna swpa out cat and put a stock one, run 100 octane gas in it cause car did sit a year before I rebuilt it, and gonna change oil....does anybody know where I can get a top engine clean fluid at???so I can clean the carbon build up on the pistons told it works wonders for smog!

 

doing some reading and I think I gonna pull back -2 degrees on timing and hope that helps but I failed almost 1000 over on the NO at 15mph and barely passed at 25 :-(

 

any other advice???

 

i had basically the same prob as u... i bought a srt-4 cat from someone for 50 buxs and then got flanges welded on then put it in my car and it passed with flying colors.. i also changed the oil to royal purple 10w30 and changed the plugs to new NGK's

 

well i going with a higher veichle wieght cat and changing oil and back timing -2 degrees...also I checked out my plugs and there burning tanish orange, guess there still good...also I bought a o2 while back and have 1 year warranty so I gonna switch that out tomorrow just to be safe cause I only have one free smog left...wondering if that seafoam stuff is any good and where do i buy it at to do a top engine clean

 

i used a bottle of passing smog for dummies... i bought it at kragen... sea foam also work's good u can get it at kragen

 

but was is seafoam??...i want to clean the carbon of top of pistons without removing head so it burns esier and cooler so it lowers smog scores

 

a buddy of mine used sea foam and after he put it in and changed his oil his **** looked nasty i would rec. putting it in then getting some super cheap like 99 cent bottle of oil and then flush it threw maybe put it in then drive it for like 200 miles then take it out and put royal purple in... royal purple also lowers number a little its proven on there site..

 

Drunk bump for more advice....think a high flow cat is making it fail that bad?

 

hmm...how do I check compression on my car cause i use to diff gauges one read inbetween 155 and 160....I used my new one and it read 180 on cylinder 1&2 then 210 on 3&4...I just got done doing that seafoam in it and boy do the neighbors get pissed cause they having a bbq lol...oh well...need advice on what compression should be on zc sohc I cant member

 

With those compression readings, that's a blown head gasket bro.

 

dude ur tryin to pass a sohc zc? the only way i have heard of them passin is if u use a stock d16a6 cam in them... (i have tried to get mine to pass)only way i could if if i turned my fuel pres. down to 30psi but then i failed visual and i was also using a srt4 cat

 

it failed only at 15mph and passed at 25mph...so you dont think anything gonna work cause I hear people passing smog with them all the time...but I am curious if my CAI making me fail!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91SiZ6 &raquo;</TD></TR><TR><TD CLASS="quote">With those compression readings, that's a blown head gasket bro.</TD></TR></TABLE>I think a blown head gasket I be smoking and and have coolant in my oil which I dont have either of them so................

 

I pass my D15B a week or so. I used G2P smog with 89 or 91 octane to clean my engine first. After I ran the full tank, I changed oil/coolant, added PCV valve, and also added another cat (the stock one I got from the HF where it goes in front of the exhaust manifold) I almost fail the 15 mph NO since I had 2 cat to heat up but I pass the other with no problem.

 

G2P?....Well I gonna do the oil change sense I seafoamed it out but you think adjusting the valves and pulling back timing will drop the NO a lot?...

 

Just because the car was warm doesn't mean the cat is warm. With the O2 readings of .3 at 25mph and .5 at 15 is your problem. With the stock cat it will heat up quicker, suck in the O2 down to 0.0

Cat's working temp is above 600 degrees. At idle it stay's around 350-400

Seafoam works and I recommend it, if it's sucked through a small vacuum line into the manifold.

I am sure that if I tested your car it would pass. I think you have got a rookie.
I am in San Ramon if that isn't to far for you. Let me know.

 

umm wheres that by I am in modesto...and he didnt use a fan what so ever if that makes a diff. I was told to run to gallons of alcohol with my gas and get a stock cat put back on and it should pass with flying colors....cause I seafoam it already so tell me a good way to warm up cat cause I am going to my friends dads work to use his digital timing gun to retard it a few cause I told that it will help

 

Oh I just map searched it and your only 70 miles so we will see if I dont pass after what info I get from you guys...

 

Check your coolant for oil. Two side by side cylinders reading 30psi lower than the rest is a blow head gasket. It's blown between cylinders one and two. You don't have to be blowing hella smoke to have a slightly blown head gasket.

It should only take about four hours to change the head gasket.

 

think its might be oil getting bythe rigns raising the compression not to sure I jsut ran seafoam through it so I will check tomorrow...but which way do I turn to check for tdc on my engine clockwise or counter clockwise I forgot or does it even matter