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  #1  
Old 09-21-2009, 02:55 PM
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VICSVX VICSVX is offline
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failed emissons....

i took my svx to emissions and i failed the hydrocarbon test.

in AZ the standard is 220 for hydrocarbon and i was at 272....any ideas?

things to know:

check engine light with code 56....i passed previuos years by reseting the computer before getting tested.

new this year:
magnaflo exhaust
enzo filter
switched from conventional oil to synthetic
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  #2  
Old 09-21-2009, 03:02 PM
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Re: failed emissons....

Warm up the cats more?

Your numbers are REALLY close...

Last edited by Sov13t; 09-21-2009 at 03:11 PM.
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  #3  
Old 09-21-2009, 06:01 PM
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Re: failed emissons....

Yeah I have the code 56 as well, but I passed just fine after going on a 20 minute freeway drive immediately prior to taking the test. Assuming you have newer spark plugs and use fuel injector cleaner once in a while, this would be the best course of action.
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Old 09-22-2009, 05:10 PM
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Re: failed emissons....

so i went and changed my air cleaner to OE and i failed agaian but worse...i got a 377!!

so i asked around and ppl said change spark plugs and possibly the wires too..how hard are those to change and what is recomended?

Quote:
Originally Posted by SoCal LS-L View Post
Yeah I have the code 56 as well, but I passed just fine after going on a 20 minute freeway drive immediately prior to taking the test. Assuming you have newer spark plugs and use fuel injector cleaner once in a while, this would be the best course of action.
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Old 09-22-2009, 05:43 PM
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Re: failed emissons....

Quote:
Originally Posted by VICSVX View Post
so i went and changed my air cleaner to OE and i failed agaian but worse...i got a 377!!

so i asked around and ppl said change spark plugs and possibly the wires too..how hard are those to change and what is recomended?
No wires, it a coil on plug system. Some say the plugs are a PITA, but I did mine in less than an hour. Theres a How-To on this above..... The most important tool to have is patience.....

I would also run fuel injector cleaner through your system prior to retaking the test.
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  #6  
Old 09-22-2009, 07:33 PM
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Re: failed emissons....

ok i'll try that this weekend hopefully

thanks...i'll give an update
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  #7  
Old 09-25-2009, 02:38 PM
nein51 nein51 is offline
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Re: failed emissons....

Need more information. What type of emissions testing is done where you are? Did you fail under load or at idle (if your testing is done that way).

High HC can be caused by a nearly unlimited number of items but a "short" list will include:
Plugs
Wires (coils)
Vacuum leak
EGR (though you would expect to see high CO at the same time)
Knock sensor
Timing advanced too far (cant burn all the fuel it is getting)


If you just had the high HC problem at idle then the first place to look is to the plugs and coil, that is typically an indicator of a pretty steady misfire. Not to ruin the day but there is also a possibility (though slight) that high HC at idle can be caused by a loss of compression when the exhaust valve leaks.

On the plus side, you are really close to passing. You might be able to get it clean enough by just changing the plugs. Can you post a picture of the results you got from your testing facility?
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Old 10-02-2009, 03:52 PM
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Re: failed emissons....

Quote:
Originally Posted by nein51 View Post
Need more information. What type of emissions testing is done where you are? Did you fail under load or at idle (if your testing is done that way).

High HC can be caused by a nearly unlimited number of items but a "short" list will include:
Plugs
Wires (coils)
Vacuum leak
EGR (though you would expect to see high CO at the same time)
Knock sensor
Timing advanced too far (cant burn all the fuel it is getting)


If you just had the high HC problem at idle then the first place to look is to the plugs and coil, that is typically an indicator of a pretty steady misfire. Not to ruin the day but there is also a possibility (though slight) that high HC at idle can be caused by a loss of compression when the exhaust valve leaks.

On the plus side, you are really close to passing. You might be able to get it clean enough by just changing the plugs. Can you post a picture of the results you got from your testing facility?

i will post later tonight...ive been busy with work.

but i got the new plugs and are going to put them in soon....i also was suggested to get a new main cat....so im picking that up tomorrow after work.

and yes i was at idle
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