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Emissions failed smog

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Run it through echeck again they done the same thing in ohio and ended up stopping it because it was useless. i ran through it back when we had it. i failed it, turned around on the road went back through a second time and passed

Posted on Sep 09, 2014

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Posted on Jan 02, 2017

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What might cause codes p0325 , p0304 to turn my check engine light on during smog test on my1998 Nissan Altima 2.4L No kicking No noise except the drive belt which just started after smog test


This is common in the Nissan's could be the cam and crank sensor these go at around 70000 to 120000 should do both at once to be safe. that will fail an emissions test for sure. hope this helps

Mar 09, 2016 | 1998 Nissan Altima

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My 1992 Geo Storm wont pass smog because of emission problem what can I do and how much will it cost


hard to say as to why it did not pass, but it sounds like you have a problem, most emissions are caused by too much hydrocarbins coming out the tail pipe, new cat converter,

Mar 24, 2015 | 1992 Geo Storm

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Failed emissions hc high


First I recommend changing spark plugs, air filter, and change the oil & filter. If these are dirty or fouled up it will kill your millage and help to fail smog.
You can reduce both NOX and CO emmissions by adding denatured alcohol to the gas tank. Run it down to a bit under 1/4 tank and add 1 1/2 gallons. It makes the engine run a bit rough, but really clean.
If you still fgail SMOG then you need a new catalytic converter.
I used to "trick" my 86' with alcohol, but just rebuilt the engine so I put a new Cat on it. It passed emissions with WELL BELLOW numbers.

Good luck.

Aug 08, 2014 | 1991 Toyota Pickup

1 Answer

My 1991 Buick regal failed the smog check, issues was failed the Fuel Evaporative Controls Functional. How can I fix it and pass smog check?


The emissions control valve is bad. Get a manual for your car from an auto parts store for the location and removal instructions.

Jun 10, 2014 | 1991 Buick Regal

1 Answer

Ok the Guy.that ran the emissions test it don't


Check the help link
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Vehicle smog test failed Due to NO MIL/check engine light?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-smog-test-failed-due-to-no.html

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Dec 22, 2012 | Cars & Trucks

1 Answer

Failed smog test


Most modern vehicles have 2 catalytic converters, there may be one located at the exhaust manifold, or be what's called a resonator. The resonator will look almost like a cherry bomb muffler, this is a crucial part of exhaust emissions.

Jan 12, 2012 | Chevrolet Blazer Cars & Trucks

1 Answer

Engine light alarm,did not pass smog?


dependent upon your state restrictions it needs to be either fixed or taken through a waiver process. in most any state that does smogs anything after 1996 with an engine light on will fail smog because it only comes on to warn you of an emissions related issue.
I would suggest having it diagnosed at the nearest 2G smog certified shop...

Jul 20, 2011 | Suzuki XL7 Cars & Trucks

1 Answer

Failed smog


means that the hc,co2,nox, emissions are too high, you will need the numbers in ppm on the read out to begin diagnossis

May 08, 2010 | 1995 Oldsmobile Aurora

1 Answer

Smog problems


Yes, a bad O2 sensor could cause the vehicle to fail emissions check.

Oct 20, 2009 | 1991 Mitsubishi Montero

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85 volvo dl fuel evaporative control functional (failed) @ smog check


replace the pvc valve and have the egr valve replace.make sure the vacuum hoses connect to egr valve and pvc replace.change air filter.all those things will cause high emission if not working properly.cause you to fail smog test.

May 31, 2009 | 1985 Volvo DL

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