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Old 02-18-2011, 09:04 AM   #1
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High ppm's

I recently took my newly purchased 1990 mustang gt for emissions test. It failed twice because the vehicle ran 734 ppm & the max should be 220 for the state of Texas. Before the first failure I added magna flow cats and after the first failure I fixed some vac hoses that had leaks and adjusted the timing and idling and needless to say I failed again. What else can I do? Any help will be greatly appreciated.
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Old 02-18-2011, 09:16 AM   #2
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Do you still have a smog pump?
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Old 02-18-2011, 10:46 AM   #3
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Re: High ppm's

No, it does not have a smog pump. Do I need it? Could I also adjust the fuel regulator?

Thanks
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Old 02-18-2011, 10:46 AM   #4
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Re: High ppm's

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Originally Posted by Ben513b View Post
I recently took my newly purchased 1990 mustang gt for emissions test. It failed twice because the vehicle ran 734 ppm & the max should be 220 for the state of Texas. Before the first failure I added magna flow cats and after the first failure I fixed some vac hoses that had leaks and adjusted the timing and idling and needless to say I failed again. What else can I do? Any help will be greatly appreciated.
im gonna assume you are talkn bout a 5liter motor.. ppm stands for "parts per million" the 220 ppm is whats called an "allowable limit" a standard usualy set by the state e.p.a.

how old are your plugs?..... and what are they gapped at?

is the cam stock?... if your running aftermarket cam, it prolly wont pass regardless of how many cat converters you throw at it. aftermarket cams tend to be very inefficient at idle and lower rpm.

check and clean your mass air... are you runing a oem or aftermarket mass air...

what do you have the timing set at? 10,12,14 degrees?

what kinda coil are you running?

do you have an msd box?

we really need more info on your set-up to give you better suggestions
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Old 02-18-2011, 11:04 AM   #5
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Re: High ppm's

SVTLX , Good stuff ...+ 1
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Old 02-18-2011, 12:15 PM   #6
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No, it does not have a smog pump. Do I need it? Could I also adjust the fuel regulator?

Thanks
If your car came with a smog pump, you r probably gonna need it. There are some tricks but you gotta know what your doing.
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Old 02-18-2011, 05:04 PM   #7
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Re: High ppm's

I didn't know Texas tested the emissions so tough. You guys are worse then us.
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Old 02-18-2011, 05:10 PM   #8
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I didn't know Texas tested the emissions so tough. You guys are worse then us.
Ha ha I'm in St.James parish. We still have a $10 sticker. Headlight and horn check. It's great.
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Old 02-18-2011, 05:30 PM   #9
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Re: High ppm's

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Ha ha I'm in St.James parish. We still have a $10 sticker. Headlight and horn check. It's great.
Lucky. I'm an State Inspection / OBDII / Commercial Certified Inspector, but it still blows my mind on some of these things. Also, I admit the work arounds are pretty simple.
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