Need help with S/C and smogging

[bikerjosh]

Anyone with an S/C in california or another state that does smog checks, my 4runner just failed part of the smog test 25 mph was ok, but on 15mph NO (PPM) measured 847, on a max of 512. Any ideas?
Car is running URDs 7th injector, magna flow cat, muffler and a 2.2 pulley at 15mph I shouldn't be in boost so I wouldn't think that would matter.
Warmed up the car driving 15 miles to the site on the hwy w/overdirve off.
If I unplugged the 7th temp would that change anything?:hiding:
Thanks

 

[the great him]

Anyone with an S/C in california or another state that does smog checks, my 4runner just failed part of the smog test 25 mph was ok, but on 15mph NO (PPM) measured 847, on a max of 512. Any ideas?
Car is running URDs 7th injector, magna flow cat, muffler and a 2.2 pulley at 15mph I shouldn't be in boost so I wouldn't think that would matter.
Warmed up the car driving 15 miles to the site on the hwy w/overdirve off.
If I unplugged the 7th temp would that change anything?:hiding:
Thanks

your SC is bad, take it off and send it too me, i can properly dispose of it for you:happens::jk::naughty: but seriously when was the last time you did a tune up? plugs, wires, filters bla bla bla? even a simple oil change can have an affect on smog. how many miles on your rig? anyhow yeah id start there, maybe unplug the 7th injector so its not dumping as much fuel in... idk too much about the SC systems on the runners as i have never worked with one, but ive done a bit with a 4.6 terminator motor... http://forums.tccoa.com/showthread.php?t=89775 not my car, its my cousins, but ive stuck my head under the hood a few times.

 

[bikerjosh]

Thanks
If you unplug the 7th it really runs poorly and it drives up one of the other values, outside of passing area.

The cat is only 2 years old so my guess is that isn't the issue, but how can you check, the whole thing is welded on.? Could the o2 sensor be causing the problem but not showing a code, it's also the original one? Any other ideas what could causing a high Nitrous Oxide rating?

Going to try cleaning the MAF, and looking for a vacuum leak.

thanks

 

[the great him]

Thanks
If you unplug the 7th it really runs poorly and it drives up one of the other values, outside of passing area.

The cat is only 2 years old so my guess is that isn't the issue, but how can you check, the whole thing is welded on.? Could the o2 sensor be causing the problem but not showing a code, it's also the original one? Any other ideas what could causing a high Nitrous Oxide rating?

Going to try cleaning the MAF, and looking for a vacuum leak.

thanks

how many miles on your rig! yeah if its the original o2 then thats a good place to start... when was the last time it had a good tune up? plugs, wires, filters ect.? its probably could use one and im sure that it would pass, new oil helps too surprisinglyi know i sound like a broken record, but you didnt address any of the questions in my previous post so im asking again

 

[bikerjosh]

only had it a couple months. 4runner has 155k on it. no idea on last tune up. wires look good, pulling the plugs to have a looksy tomorrow morning.
replaced airfilter 2 months ago.
thanks Josh

 

[the great him]

ok so yeah replace the o2 sensor and fuel filter, get some new plugs and wires. id almost garentee that the o2 is the original and toyota recommends it be replaced at 90-100k(just replace the front one, dont bother with the back as it wont affect how the truck runs) fuel filter is only like $15, get the right plugs and some new wires and go from there. just cause the wires "look" good doesnt mean crap, i wouldnt be surprised if they have only been changed once

 

[ChildrenOfBodom]

I'd do what they said, a tune up and then the O2 sensors.

And Just for the record, if it ends up being the catalytic converter, just more evidence Magnaflow sucks. I am surprised my Magnaflow cat still works.

 

[bikerjosh]

Looking for something high to jump off.

Ok, well things did not go as planned.
Here's an update with the stats more clearly laid out.
Stats: 1998 4runner 155k miles Originally sold out of state
3.4 w/AT, SC, URD 7th and 2.2 Pulley, headers, one cat a magnaflow and magnaflow muffler.
First 02 is a Bosch wide band thread in sensor, post cat 02 sensor is the denso with traditional 2 bolt flange.

Also of important note I have not had any CELs during this time.

Took it for a smog test. Needed a new gas cap. Passed all but one category on 15 mph test NO was higher than limit. 25 mph test was fine. (see numbers below)
Started replacing items: New plug wires, new Ik22 plugs (those were the recommended plugs and what was already in it), new PCV valve, new gas cap, new upstream O2 sensor (same one in it as above), cleaned the MAF and throttle body, changed oil/filter, ran some of that CRC guaranteed to pass snake oil through it, then filled it up with some Chevron premium got it good and warmed up took it back to smog place and ….. any guesses…? Well it was 2-3 times worse across all levels (see second numbers)

---------%CO----------%O2-------------HC (ppm)-------------CO%------------NO (ppm)----------Results
Test----meas----------meas------------max/meas---------max/meas----------max/meas
15mph--14.7-----------0.0--------------51 / 20----------.65 / .28---------512 /847--------------fail
25mph--14.8----------- 0.0--------------35/15------------.79 / .24---------765 / 697-------------pass
Test 2
15mph--13.9------------0.6--------------51 /104------------.65/ .65---------512 / 2056--------gross polluter
25mph--14.3------------0.3--------------35 / 62------------ .79/ .50---------765 /1497-------------fail


After I got done saying $%$#^**^^$##@%^&((())_&&&, and where is my Glock G17? I took a couple days off of dealing with it.

So, I’m out of state for a few days and trying to come up with my next plan.
Could a cat, crap the bed in two weeks, not throw a CEL and still cause this? The numbers have jumped 2-3 times in value. I’m at a total loss. The smog tech said the numbers look like the car doesn’t have a cat. The cat, was a 49 state cat, and if I need to replace that now, my guess is they will have to install a CARB (hate them) approved unit.

Any ideas? Thanks for your help/ideas. No I wouldn’t shoot my 4runner, I really do love it.

:gun4:josh

 

[the great him]

well im not sure what to say here, first off, anything with the name "bosch" on it should be melted down for scrap, its all junk! i would only use ngk or denso, that goes for plugs, wires, and sensors... id also try and get a bigger pulley to lower the boost, try 2.4 or 2.6. and or buy a new cat. you can get a hi-flow cat for under $150 and yeah stay away from magnaflow...

 

[bikerjosh]

Bad cat, o2 sensor, tune?

Any ideas out there:sniper:, hoping to get released and back to califorina to deal with my 4runner issues by friday.
thanks

 

[8sm]

Sorry to hear of your problems. Have a referred auto shop take a look at the results, perhaps they can narrow the results to a solution. A good shop should have a solution based on the test result alone. I'd say the tech advice maybe your problem, bad cat or non-compliant calif. approved cat.

Also, I thought a 49 state cat was good in every state except California. Check out the classifieds ** 99 4runner cali cat available for sale.**

http://www.toyota-4runner.org/classifieds-buy-sell-anything-related-toyota-4runner-no-commercial-ads-please/91571-sale-rear-catalytic-converter-99-cali-spec.html

Regards, 8sm

 

[bikerjosh]

"Also, I thought a 49 state cat was good in every state except California. Check out the classifieds ** 99 4runner cali cat available for sale.**"

Yes, technically a 49 state cat is no go in California if they notice at time of smog. Based on my first test numbers, it would have seemed some tune up items would have cleared things up enough to pass the NOx value measured in the low speed test.

Still unsure why/how my numbers would have changed so much for the worse after adding new parts unless one or more of the new items was bad.

thanks