so I went for my smog test today, and I barely failed . Well the guy told me It's probably a quick fix, so I figured I could probably do it myself; This is what I did to the car before I went, car was recently purchased with a sohc sc swap non v tec it's in a 91 crx si with only dc sports headers and an aem cold air intake
New
1 spark plugs n wires gapped correctly w/ dilectric grease
2 ignition rotor
3 dizzy cap and gasket
4 antifreeze
5 thermostat
6 battery
7 ground cables
8 timing belt
9 fuel filter
10 pcv valve
11 valve cover,head, intake, exhaust manifold gasket, torqued correctly
12 O2 sensor
13 oil and filter
14 timing set
15 brake fluid
16 tranny oil
17 air filter
18 radiator and gas cap
19 valve job
before doing this I used up a bottle of stp fuel system cleaner
But I still failed, the guy told me to check my sparkplugs torque and wires, because I was getting fuel out of my exhaust, he said maybe a vacuum or fuel leak but my timing was correct and since the motor is fairly new that it shouldn't be that hard to fix, but gas was leaking from my tailpipe
I went home and my plug wires were not correctly ordered, My vacuum had no leaks
the only things I failed was
1 HC (PPM) at 15 139, 134 max n 25 mph 108 108 max
2 CO (%) at 15 mph, .89 .82 max
3 NO (PPM) at 15 mph, 1396 847 max


questiion:
1 anyone have the distributor to cylinder firing order for a 91 crx si with a sohc zc non v-tec, and can having the plugs wired incorrectly cause this?
2 The only thing I haven't changed is the catalyic converter, will this help me pass?
3 you smog wizards out their, based on my results can you recommend what to fix.
I have no codes and nothing comes out of my tailpipe now that I rearranged the wires a little, no smoke nothing, no eating oil or coolant
thank you so much if you read this, and for the help





Modified by acmoc at 1:08 PM 5/28/2008

 

"lean" it out and go back. ha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fin781 &raquo;</TD></TR><TR><TD CLASS="quote">"lean" it out and go back. ha </TD></TR></TABLE>
ya, I get a free retest in 30 days, but what do you mean by lean it out? I still need the diagram to which cylinder goes to the dizzy please. thanks

 

well, I though about, and since timing plays a role, so should the order of the wires rite? please someone need that diagram.

 

will this also cause bad mpg

 

dizzy
34
12

valve cover
4321&lt;1 is closest to the cam gear.

 

it was probably the fuel cleaner how many tanks did u go threw from the time u put the fuel system cleaner in to the time u smog it

i would run threw the tank completely till the point were your almost going to run out of gas then fill it up and test again if there was any of the fuel system cleaner in your tank it's going to make your car run rich

hope this helped

 

Hey change that cat on it and take it back in. It will pass smog after that.Guranted!!!lol

 

I went through 1 whoe tank like you described and then a 1/4 tank. I'm thinking of putting the stock airbox and headers on their and change the cat too, On my dizzy numbers 1 and 2 were misplaced, 1 wire was on 2 and 2 wire on 1, would that cause it, even though the man said my timing was rite.

anyone have the carb # for a 91 crx si dc sports headers
thanks for the help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big red89 &raquo;</TD></TR><TR><TD CLASS="quote">Hey change that cat on it and take it back in. It will pass smog after that.Guranted!!!lol
</TD></TR></TABLE> you sound pretty sure of this, have you worked at a smog center

 

if you're over on nox, assuming your engine is running at the correct temp, your cat is probably not operating at a high enough efficiency.

i just had my emissions tested on sat. and my nox output was double the allowable limit. i decided to go ahead and pay for the diagnostic to make sure my egr wasn't bad, and the only thing wrong was my cat (showing no temp. differential)

i'm waiting on the replacement to come in so i can get it retested.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kacivic &raquo;</TD></TR><TR><TD CLASS="quote">if you're over on nox, assuming your engine is running at the correct temp, your cat is probably not operating at a high enough efficiency.

i just had my emissions tested on sat. and my nox output was double the allowable limit. i decided to go ahead and pay for the diagnostic to make sure my egr wasn't bad, and the only thing wrong was my cat (showing no temp. differential)

i'm waiting on the replacement to come in so i can get it retested.</TD></TR></TABLE>
cool, I guess that's what I got to do. I guess it was kind of dumb of me to change all that, and not the cat huh

 

is it normal, when you start your car, to idle at about 1000-1500 rpm, then drop to 500- 700 as it warms up and stay their

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by acmoc &raquo;</TD></TR><TR><TD CLASS="quote">is it normal, when you start your car, to idle at about 1000-1500 rpm, then drop to 500- 700 as it warms up and stay their
</TD></TR></TABLE>

yes thats normal if it drops to 500-700rpm after it warms up
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kacivic &raquo;</TD></TR><TR><TD CLASS="quote">if you're over on nox, assuming your engine is running at the correct temp, your cat is probably not operating at a high enough efficiency.

i just had my emissions tested on sat. and my nox output was double the allowable limit. i decided to go ahead and pay for the diagnostic to make sure my egr wasn't bad, and the only thing wrong was my cat (showing no temp. differential)

i'm waiting on the replacement to come in so i can get it retested.</TD></TR></TABLE>

that sounds kinda weird i'd take it to another mechanic if a car is running properly at stoichiometry (ideal air/fuel mixture) it should pass smog without a cat the only reason why cars have cats is because they don't always run at stoichiometry like at full throttle, excessive loads, extreme atmospheric conditions, etc none of which smog stations check

bottom line if you replace your cat it wont fix your car you'll just be masking the problem the mechanic that said that your cat was bad can actually get in trouble for that

if you have any more questions just ask i'll be monitoring this forum now i'm interested to see what happens

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NlCK B &raquo;</TD></TR><TR><TD CLASS="quote">

yes thats normal if it drops to 500-700rpm after it warms up


that sounds kinda weird i'd take it to another mechanic if a car is running properly at stoichiometry (ideal air/fuel mixture) it should pass smog without a cat the only reason why cars have cats is because they don't always run at stoichiometry like at full throttle, excessive loads, extreme atmospheric conditions, etc none of which smog stations check

bottom line if you replace your cat it wont fix your car you'll just be masking the problem the mechanic that said that your cat was bad can actually get in trouble for that

if you have any more questions just ask i'll be monitoring this forum now i'm
interested to see what happens </TD></TR></TABLE>

yea cool, I haven't gotten a clear answer yet s to my messed up spark plug wires could've caused it my wire from cylinder number 1 was going to dizzy number 2 and wire 2 to dizzy number 1. I had some liquid at my tailpipe, I think it could of been gas because I fixed it and there's no more liquid their, also, maybe I should of ran it fo more than 15 miles before getting tested, on the freeway maybe. I get to retest once a week has passed, I'm gonna try to kill all the gas in my tank before I go back

 

if u had the firing order wrong it will cause you to fail that causes a misfire which can cause and increase in hc's (unburnt fuel)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NlCK B &raquo;</TD></TR><TR><TD CLASS="quote">if u had the firing order wrong it will cause you to fail that causes a misfire which can cause and increase in hc's (unburnt fuel) </TD></TR></TABLE>
exactly, he sais I had to many of those, it's the only one I failed at both speeds. I fixed it and now my car runs hella better, iono if it's psychological.

 

well it should be running better you where basically running on two of your four cylinders i'm shocked the thing ran

the nox is kind a weird thought nox is created when combustion temps exceed 2500 degrees and if you had the spark plug wires mixed the nox should actually come down because the raw fuel would cool down the cylinders hmmmmm

well i'd go back and test it now that you got the wires back in order do u have free retests until you pass


Modified by NlCK B at 1:19 AM 5/29/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big red89 &raquo;</TD></TR><TR><TD CLASS="quote">Hey change that cat on it and take it back in. It will pass smog after that.Guranted!!!lol</TD></TR></TABLE>

WERD.

My 88 Si failed on the NO portion of the test miserably. I replaced the CAT and my readings were so low they almost didn't register. Although I only failed on NO, the HC, CO, and NO all went way down. So for the $160 I spent on the CAT and the hour to make it fit perfectly, I second the above opinion that you will pass with flying colors with a new CAT.

 

Yup yup replace the cat. Listen I live in Cali too and have had enough smog test to last a lif time.LOL .Spend the money and get a new cat put on take it back for the smog n sit back and relax.LOL. It will pass. Your old cat is probobly all plugged up and not working anymore.Thats the first think I replace on an older car.Good luck....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big red89 &raquo;</TD></TR><TR><TD CLASS="quote">Yup yup replace the cat. Listen I live in Cali too and have had enough smog test to last a lif time.LOL .Spend the money and get a new cat put on take it back for the smog n sit back and relax.LOL. It will pass. Your old cat is probobly all plugged up and not working anymore.Thats the first think I replace on an older car.Good luck.... </TD></TR></TABLE>
haha yea, that thing is like dam near 18 years old

 

actually, does anyone know if the sohc zc non vtec engine produces more emissions than the d16a6. because that would mean they're testing me for the d16 but I have the zc

 

stay tuned, ordered my cat from napa
results soon.
wish me luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by acmoc &raquo;</TD></TR><TR><TD CLASS="quote">I went through 1 whoe tank like you described and then a 1/4 tank. I'm thinking of putting the stock airbox and headers on their and change the cat too, On my dizzy numbers 1 and 2 were misplaced, 1 wire was on 2 and 2 wire on 1, would that cause it, even though the man said my timing was rite.

anyone have the carb # for a 91 crx si dc sports headers
thanks for the help</TD></TR></TABLE>
man i'm not trying to call you a dumbbass but....
IF YOU MESS THE PLUG WIRES UP IT WOULDN'T RUN ..........BUT IF YOU MESS THE INJECTOR WIRES UP IT WOULD **** AND SMOKE LIKE A HOOKER ON CRACK

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beana &raquo;</TD></TR><TR><TD CLASS="quote">
man i'm not trying to call you a dumbbass but....
IF YOU MESS THE PLUG WIRES UP IT WOULDN'T RUN ..........BUT IF YOU MESS THE INJECTOR WIRES UP IT WOULD **** AND SMOKE LIKE A HOOKER ON CRACK
</TD></TR></TABLE>
yea, that's been covered. I didn't install them though, someone else did

And I'm not trying to call you a *dumbass* but... Injector wires were never mentioned


Modified by acmoc at 9:59 PM 5/30/2008