Smog help - Failed, again. New CAT
Okay, the papers speak for themselves.
New catalytic converter - purchased 2 days ago. New air filter - purchased today New spark plugs - 05/16/2012 (platinum - you don't need to GAP them) New distributor - 01/01/2011 New fuel filter - 01/01/2011 New fuel pump - 01/01/2011 Any ideas? Is there an emissions requirement difference between the d16a6 and d15b1/2? I'm sure the engine's actual output is different but is the level different that they require for it to pass? Someone has to know some shop that's down to pass this for some extra coin maybe? https://oi45.tinypic.com/120rx3t.jpg https://oi50.tinypic.com/28klhue.jpg https://oi45.tinypic.com/659z83.jpg |
Re: Smog help - Failed, again. New CAT
How many miles did you run the new cat before testing?
They do need a little time before they light up correctly. Would be really helpful if you can post your test result sheet. No clue what areas you are failing in. |
Re: Smog help - Failed, again. New CAT
Results are posted, maybe the host is blocked where you're at?
Just in case, the main point is 15mph NO, max = 835 ave =471 measured = 1166 All else well below the ave. |
Re: Smog help - Failed, again. New CAT
Originally Posted by 4drEF
(Post 47949985)
How many miles did you run the new cat before testing?
They do need a little time before they light up correctly. Would be really helpful if you can post your test result sheet. No clue what areas you are failing in. Prior to that test we also redid my timing and set it to 16, not sure why this place read it at 18. I definitely haven't fucked with it since.
Originally Posted by 24TEN
(Post 47950013)
Results are posted, maybe the host is blocked where you're at?
Just in case, the main point is 15mph NO, max = 835 ave =471 measured = 1166 All else well below the ave. Yeah the car drives fuckin amazingly well. No sputter, no erratic idle, I get 35+ MPG when babying it. Average 33 when pushing it hard. I have no complaints about the engine. You can notice that each time my smog levels got slightly better, with the CAT they are a million times better except for my NOx though. Could an exhaust leak be causing it? I know generally NO failure is due to high engine temp - leniency a/f ratio. According to latest Lambda Calculations - 15.27 A/F ratio. I'm guessing too lean then? How would I go about making it more rich? >18° BTDC or <18° BTDC? |
Re: Smog help - Failed, again. New CAT
The last report indicates that the engine is running lean (very low HC). Have you replaced the fuel filter and measured the fuel pressure?
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Re: Smog help - Failed, again. New CAT
what engine do you actually have?
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Re: Smog help - Failed, again. New CAT
Originally Posted by RonJ@HT
(Post 47950124)
The last report indicates that the engine is running lean (very low HC). Have you replaced the fuel filter and measured the fuel pressure?
Bad O2 sensor?
Originally Posted by v4lu3s
(Post 47950144)
what engine do you actually have?
Engine: sohc zc NON vtec Trans: Si (I know this will raise it slightly based off the rpms) Fuel pump is aftermarket from vatozone - maybe garbage? |
Re: Smog help - Failed, again. New CAT
Originally Posted by Nooch
(Post 47950204)
Changed it last year. Maybe 10,000 miles on it absolutely max.
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Re: Smog help - Failed, again. New CAT
Now the images show =/ Something weird with Chrome going on.
What octane fuel were you running for your tests? |
Re: Smog help - Failed, again. New CAT
Originally Posted by RonJ@HT
(Post 47950265)
Measure the fuel pressure. If it's fine, test the O2 sensor.
Originally Posted by 4drEF
(Post 47950269)
Now the images show =/ Something weird with Chrome going on.
What octane fuel were you running for your tests? |
Re: Smog help - Failed, again. New CAT
What octane does everyone suggest? I know the differences but have never heard a definitive choice for the ZC sohc.
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Re: Smog help - Failed, again. New CAT
so glad i get my test done under the table. i got the same motor and tranny as you but i would rather just pay to make it pass. don't have time for failure and it runs beautiful.
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Re: Smog help - Failed, again. New CAT
Originally Posted by BiG ChOr!Zo
(Post 47950717)
so glad i get my test done under the table. i got the same motor and tranny as you but i would rather just pay to make it pass. don't have time for failure and it runs beautiful.
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Re: Smog help - Failed, again. New CAT
Assuming you are driving around a bit before the test and letting the car idle while you wait?
And then getting right on to the dyno within 5 minutes for testing? Could be the octane is too low. I can't find it right now so I couldn't verify, but I remember the manual says 87 if you don't have a cat and run leaded fuel, 89 for SOHC, and 91 for DOHC. You want to use the lowest octane your engine can take because it will give a more complete burn. Downside is if you go too low, then you get pre-detonation and other wonderful high internal temp issues that would possibly trigger a HC issue. How is your cooling system doing? If your system has been abused with things like tap water (deposits built up internally) or improper coolant mix ratio then it could be abnormally heating the engine internally. This would reduce cooling efficiency and increase internal temps. |
Re: Smog help - Failed, again. New CAT
Never overheats. Original rad so it's probably shot internally but I don't have any cooling issues (knock on wood). Always 50/50 coolant premixed. Previous owner probably fucked it a little but it doesn't give me any problems.
I drove around, turned it off for maybe 30 seconds before dyno. Even had the smog shop cooler fan blowing on it! If you could verify the octane reading that would be great. I guess I'll give it a shot. Going to change out the spark plug wires and o2 sensor too. No codes being thrown obviously. |
Re: Smog help - Failed, again. New CAT
I see you're testing as a 1.5, is your car still dpfi? When I had an a6 in my std hatch I just had to unplug one injector for it to pass as a std while mpfi lol
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Re: Smog help - Failed, again. New CAT
Originally Posted by TeamRedline89Hatch
(Post 47951448)
I see you're testing as a 1.5, is your car still dpfi? When I had an a6 in my std hatch I just had to unplug one injector for it to pass as a std while mpfi lol
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Re: Smog help - Failed, again. New CAT
Originally Posted by Nooch
(Post 47951591)
I'm mpfi... I'm not getting enough fuel as it is apparently (a/f ratio of 15.27/1)
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Re: Smog help - Failed, again. New CAT
Originally Posted by TeamRedline89Hatch
(Post 47951817)
Crap sorry didn't catch that. I am at work atm so I was in a hurry lol. That does seem a bit lean, how do your plugs look? If all else fails.. I know a guy who knows a guy ;) lol
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Re: Smog help - Failed, again. New CAT
Would a leak in the exhaust system cause high NOx? I don't think I have a leak but I may give it a shot retightening everything if it's suggested that it may be the culprit.
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Re: Smog help - Failed, again. New CAT
Originally Posted by Nooch
(Post 47952684)
Would a leak in the exhaust system cause high NOx? I don't think I have a leak but I may give it a shot retightening everything if it's suggested that it may be the culprit.
Again, start with the basics:
Originally Posted by RonJ@HT
(Post 47950265)
Measure the fuel pressure.
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Re: Smog help - Failed, again. New CAT
Originally Posted by RonJ@HT
(Post 47952687)
Nope. It would make the engine run rich.
Again, start with the basics: |
Re: Smog help - Failed, again. New CAT
Alright so how do I check the fuel pressure without having to buy the $350+ fuel pressure gauge through Honda?
I'm reading a million different ways, all seem terrible. |
Re: Smog help - Failed, again. New CAT
Would it make a difference that the motor has a mpfi swap but it's being tested as a 1.5 dpfi? Would the mpfi make the numbers jump. Not sure if the dpfi limits are different than the mpfi. One reason I never did a mpfi swap so as I can still pass smog legally.
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Re: Smog help - Failed, again. New CAT
Originally Posted by rallypoint_1
(Post 47954317)
Would it make a difference that the motor has a mpfi swap but it's being tested as a 1.5 dpfi? Would the mpfi make the numbers jump. Not sure if the dpfi limits are different than the mpfi. One reason I never did a mpfi swap so as I can still pass smog legally.
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