S13 FAILED SMOG!!!!!! PLZ HELP!!!!

[mexicanS13]

so i just got my first ever S13 DOHC, yyyyyaaaayyyy lol.. i sold my 02 celica to get this car. ive been wanting to get one since 95 when my uncle had his coupe.. well back to the story.. so i go and get the car to a smog check and it fails this is what they told me.. the NO(PPM) was way to high this are the numbers... <15mph> MAX=785 GP=1982 MEAS=3093 <25mph>MAX=724 GP=1782 MEAS=1560



a friend told me he has the same problem but he changed the pre-cat gasket because the old one was leaking and sure enight if passed after. i would like to try and fix the problem before i give up and just do it crocket if you had this problem or know what it is please help me out!!!!

[Wc240]

take off and clean out your egr, replace the vac lines goin to it. check for exhoust leaks. what are your other gasses? looks like your runnin hella lean

[mexicanS13]

take off and clean out your egr, replace the vac lines goin to it. check for exhoust leaks. what are your other gasses? looks like your runnin hella lean

Thanks ill be doing that tomorrow, whats the best way to clean out the egr and lines?

the rest of the gasses are:at 15mph, RPM 1659<%CO2> <%O2> ....<HC(PPM)> ....... .. <CO(%)> ..... <NO(PPM)><MEAS> <MEAS> <MAX-GP-MEAS> <MAX-GP-MEAS> <MAX-GP-MEAS><12.0> <3.9> ..... <114-288-153> <0.73-2.23-0.65> <785-1982-3093>

at 25mph, RPM2743<%CO2> <%O2> ......<HC(PPM)> .... <CO(%)> ...... . <NO(PPM)> <MEAS> <MEAS> <MAX-GP-MEAS><MAX-GP-MEAS> <MAX-GP-MEAS> <13.2> .. <2.8> ....<88-238-72> ..<0.61-2.11-0.11> <724-1782-1560>

This are all the numbers and gasses, i would like the car to pass and not have to get a fake pass smog paper, i got that guaranty 2 pass smog stuff to clean out the motors internals and im thinking off getting all exhaust gaskets new and make sure theres no leak from them, will also give the hole exhast a visual inspection, and clean EGR and vac lines like you said.

Modified by mexicanS13 at 7:54 PM 3/25/2010
Modified by mexicanS13 at 8:00 PM 3/25/2010

[Wc240]

make sure its in good condition, regular tune up and what not. but you mabe looking at a cat. sorry to say.

[mexicanS13]

I was thinking the same thing, the other owner didnt really drive the car because he has two other cars he works on, but he did say when he got it it passed the smog. I asked when did he do the last tune up and it seem like when he first got it a year ago from this month. then the car sat for a while. he took it out sometimes i guess. do you think i should disconnect the EGR line that goes into the exhast manifold to see if theres even air coming out?cats are expensive lol

[Roger_cha]

WOW i had that problem before and the second time i went to the state ref. but check your cat if its still good then the b.p.t valve right on top of the egr valve the hose that connect under that valve that goes into the egr valve might be rotten or busted, or maybe the b.p.t valve is bad it self because that happen to mine.
Modified by Roger_cha at 4:19 PM 3/26/2010

[Cone Junky]

As mentioned, make sure the EGR is working. If it isn't, then you'll need to see if the valve itself is bad or if the ports in the intake manifold are clogged.Any exhaust leak before the catalyst will make the NOx skyrocket also.

A Sea Foam cleansing is also recommended, it will probably help bring down the numbers too.

[mexicanS13]

Thanks for all that info ill be starting on it right now after i post this, and what do you mean by sea foam cleansing??? im still going to replace the pre cat gasket and exhast one too. what should i be looking at when i look into the cat?how can i know if its fine?

i really appreciate all the help. hopefully i can get the car to pass smogged soon

[Klits562]

sea foam is a product you can get at autozone or similiar store in your area. It should be in the engine treatment section its a soda can sized can of i forgot what but you put 1/3 of it in your oil 1/3 in your gas tank and 1/3 in to a vacuum line(people use the brake booster line)It cleans all the crap out of your motor and i just did it 2 weeks ago and felt a very noticable inprovement in my cars power and acceleration and it only cost about $10.You can try that and make sure you change your oil 10 minutes after letting it sit in your oil.

There are a few seafoam threads on here and youtube.You may even be able to use it to clean your egr if you suck up the liquid through one of the egr vac lines but i have never done it so maybe someone else on here can put in more information.

[mexicanS13]

sea foam is a product you can get at autozone or similiar store in your area. It should be in the engine treatment section its a soda can sized can of i forgot what but you put 1/3 of it in your oil 1/3 in your gas tank and 1/3 in to a vacuum line(people use the brake booster line)It cleans all the crap out of your motor and i just did it 2 weeks ago and felt a very noticable inprovement in my cars power and acceleration and it only cost about $10.You can try that and make sure you change your oil 10 minutes after letting it sit in your oil.

There are a few seafoam threads on here and youtube.You may even be able to use it to clean your egr if you suck up the liquid through one of the egr vac lines but i have never done it so maybe someone else on here can put in more information.

Thanks, i went today to get it but they were out and it was late so im getting up early tomorrow to go to another auto store, also i put in some thing called guaranty 2 pass on the gas tank so i might have to wait for that to be used up. i was getting the carb cleaner spray to clean out the EGR, BPT, and lines but he kept saying its better if i use brake cleaner because thats what he used on his car. ill just get the carb cleaner tomorrow because i forgot to get a new EGR gasket and is there any EGR port plugs on a 240??? and how many?? so i can get them tomorrow

[mexicanS13]

So i woke up early today and i worked on taking out the EGR and BPT valves, i cleaned them and did the vaccum test on the egr and it was good, but................................. then i went to check on the hole exhast for leaks and to look at the cat. The cat looks good so does the ex. manifold and that small mid pipe. then i moved down to look at the rest of the piping and saw the damage. The resonater thats before the muffler( right next the where the left rear tire is) is messed up, the welds from the piping on both sides are completely cracked, they go all around the pipe so its completely free from the pipes. i can move the resonater around. hope all this makes sence. well here are the pics i took of it.. can this be the cause of the high NOx?

http://www.flickr.com/photos/4...tream/

http://www.flickr.com/photos/4...tream/

[Wc240]

no. would couse high o2, but not nox. if you have a fatty leak BEFORE the cat then thats different

[mexicanS13]

no. would couse high o2, but not nox. if you have a fatty leak BEFORE the cat then thats different

Thanks, well hopefully with the cleaning and that guaranty2pass thing it lowers the NOx.. if not im just going to use that sea foam and drive around leaving a trail of smoke around san jose. i did get the repair guide book for the car to study the emissions cycle system but it all points to the egr. i keep looking for the solenoid but can't find it. is there a way to see if its working with out taking it out?

[Cone Junky]

Most likely the EGR ports in the intake manifold are clogged. This requires taking off the top half of the intake manifold and removing the access plugs (brass allen fittings).Carb cleaner is a bettr choice for cleaning. It breaks down the carbon deposits better than brake clean.

[mexicanS13]

Most likely the EGR ports in the intake manifold are clogged. This requires taking off the top half of the intake manifold and removing the access plugs (brass allen fittings).Carb cleaner is a bettr choice for cleaning. It breaks down the carbon deposits better than brake clean.

Thanks, thats what i was planing on doing next, i wanted to replace the plugs too but no auto store even knows what im talking about

[mexicanS13]

im a f*cking idiot!!!! lol... well the day i took out the EGR plus BPT and cleaned them i didnt try to see if it worked with the car on. it passed my test with the vaccum pump because it held the valve open, but today when i took my mom to Mi Pueblo i desided to open the hood and try it. so i put my fingers and push up and the cars starts to stumble like its going to turn off so that good, then i rev the motor and the F*ckn EGR doesn't even open!!!! lol im planing on taking the top part of the manifold to take off the port plugs and clean t hat shhhh out this weekend. now i would like to know if theres a chance its the EGR solenoid??? or should i start pulling all the vaccum lines off even the exhast manifold?

[mexicanS13]

im a f*cking idiot!!!! lol... well the day i took out the EGR plus BPT and cleaned them i didnt try to see if it worked with the car on. it passed my test with the vaccum pump because it held the valve open, but today when i took my mom to Mi Pueblo i desided to open the hood and try it. so i put my fingers and push up and the cars starts to stumble like its going to turn off so that good, then i rev the motor and the F*ckn EGR doesn't even open!!!! lol im planing on taking the top part of the manifold to take off the port plugs and clean t hat shhhh out this weekend. now i would like to know if theres a chance its the EGR solenoid??? or should i start pulling all the vaccum lines off even the exhast manifold?

LOL this is super late to my own respond.. well in the end the car pass smog.. the b.p.t was no good and the E.G.R pipe from the mani to the E.G.R was clogged.. now the car has passed so onward to the next problem lol