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  #1  
Old December 13th, 2012, 09:01 PM
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No Pass Emissions causes

Is it a large concern that a 90 for sale cannot pass emissions in it's current state? Is this a simple fix, for example maybe a O2 sensor, CC, or needs new exhaust? Colorado is strict as hell on cars passing so I figured I would see if anyone has an issue with their 90 not passing and the possible reasons...talking NAS here...
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  #2  
Old December 13th, 2012, 09:17 PM
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what year 97 or 95/94 different trucks
usually o2's and a tune up
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Old December 13th, 2012, 09:17 PM
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Just buy one that passes in CA. It'll pass everywhere.

-- I grew up in Colorado and lived for 7 ish years in Boulder. Even while living in Boulder I would register my cars in Ft. Collins at my folks house because at the time Larimer county didn't require emission inspections.
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Old December 13th, 2012, 09:35 PM
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Depends. 97 will flunk for any check engine light. 93-95 have to have a sniffer and frankly because they can't load test them, it will pass even without cats if it is decent tune.

In any case, they can usually be made to pass easy enough.
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Old December 13th, 2012, 09:38 PM
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One in question is a 94 if that helps...most likely a tune up I figure.
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Old December 13th, 2012, 09:58 PM
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Usually a reason is given in the fail report. The owner should have that report available and provide the information to you.
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Old December 14th, 2012, 12:31 PM
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Only time my 94 has fail was when the crack in the y pipe got bad enough to finally smell in the cab.
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Old December 14th, 2012, 12:39 PM
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Thanks for the replies, I will ask seller for reasons why it failed. I can't imagine it wouldn't ever pass emissions if everything was tuned up/fixed...
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Old December 14th, 2012, 12:42 PM
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Quote:
Originally Posted by WeBeCinYa View Post
One in question is a 94 if that helps...most likely a tune up I figure.
Yup. Tune up and oil change ... or just run it on the machine when the engine is warm, not cold.

Mine would always pass with near zero emissions numbers.
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Old December 14th, 2012, 12:52 PM
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I've been told time and time again that these D90's emission systems (when working properly) are tighter than needed to be.

Mine failed for stupid reasons... bad 02 sensor and the PO had removed the CEL bulb so had no idea. Then the shop took it again for check when I had removed the odo for fix... um yeah... can't verify mileage = fail.
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