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Audi Original "S" Cars Discussion forum for the Audi Audi Ur S4, Ur S6, S2 & RS2

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Old 02-09-2007, 09:21 AM   #1
cpayne
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Default What are the chances that a 7A Exhaust Cam with a Stock Intake Cam are enough to fail emissions?

Just wondering as a few months back..it took me a few tries before I passed. After replacing oil, o2 sensor, running some combustion cleaner, I did pass..but not by a huge margin.

Just wondering how much the overlap w/ the 7A cam would hurt my test?
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1992 Audi Pearl UrS4 2.2L 20V 396 WHP (Huge Mod List)
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1998.5 A4 1.8TQMS (MTM Stage II, Samco, Forge)

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Old 02-09-2007, 09:52 AM   #2
Rich L.
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Default I passed with that setup...

...and no cat! It was a non-treadmill sniff test, 3500 RPM in neutral. I don't think the cam is your issue.

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Old 02-09-2007, 05:04 PM   #3
Stroker//S4
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Default Colorado emissions suck...that is all

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Old 02-09-2007, 05:16 PM   #4
cpayne
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Default Apples to Oranges...

Sniff test...bah..try the full blown dyno type test we have to go through here in CO
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2005 Mini Cooper S - Modded
Current Audi:
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Previous Audi's:
1992 Audi Pearl UrS4 2.2L 20V 396 WHP (Huge Mod List)
2001.5 S4 (UUC, Borla, 710N, 551M ABT and MTM Stage II)
1998.5 A4 1.8TQMS (MTM Stage II, Samco, Forge)

1987.5 Special Build Coupe GT - (Many Mods)
Other Toys
2003 Buell XB9SL - Modded of course
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Old 02-09-2007, 07:49 PM   #5
germantoy
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Default um thinking a cam is your problem is lunacy. bad tune/software = your current running conditions

nothing but that.
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Old 02-09-2007, 08:57 PM   #6
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Default But, how much did you "tip" the emissions inspector?

;^)
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Old 02-09-2007, 09:03 PM   #7
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Default Sort of agree...it's something else. Keep looking.

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Old 02-09-2007, 09:05 PM   #8
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Default CT is no treat either. I just got a notice for the 'burban - 5th car to go so far this year.

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Old 02-10-2007, 06:07 AM   #9
cpayne
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Default Cam "contributes" to the issue...now whether or not it is the sole issue probably not

Oh how 034 IIC with Mark Swanson's plug-in harness and Jim Green's tuning expertise is calling my name....someday
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2005 Mini Cooper S - Modded
Current Audi:
None
Previous Audi's:
1992 Audi Pearl UrS4 2.2L 20V 396 WHP (Huge Mod List)
2001.5 S4 (UUC, Borla, 710N, 551M ABT and MTM Stage II)
1998.5 A4 1.8TQMS (MTM Stage II, Samco, Forge)

1987.5 Special Build Coupe GT - (Many Mods)
Other Toys
2003 Buell XB9SL - Modded of course
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Old 02-10-2007, 08:51 AM   #10
cpayne
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Default What are you doing w/ your car now? "Under Knife?"

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2005 Mini Cooper S - Modded
Current Audi:
None
Previous Audi's:
1992 Audi Pearl UrS4 2.2L 20V 396 WHP (Huge Mod List)
2001.5 S4 (UUC, Borla, 710N, 551M ABT and MTM Stage II)
1998.5 A4 1.8TQMS (MTM Stage II, Samco, Forge)

1987.5 Special Build Coupe GT - (Many Mods)
Other Toys
2003 Buell XB9SL - Modded of course
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Old 02-10-2007, 08:51 AM
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