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1994 mitsubishi diamonte cannot pass colo. emissions-what is usually the problem-how do you fix it?

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I read my Misubishi book in car and know what they need to look at-thanks

Posted on Sep 14, 2008

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I have a 2004 Mitsubishi Galant and I need to pass emissions but the P0442 appeared with going through emissions. My check engine light is off now can I resend it through emissions? I live in DC.


code p 0442 refers to problems with the EVAP system
unless you have fixed the problem there is no change to the emission results and it will fail again

Oct 18, 2015 | Mitsubishi Cars & Trucks

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Why is the reasont it didn't want to pass smog on the 15 mph it was to high on 1994 Mitsubishi mighty max 2.4 v4


No idea
CO-- I would Guess failed ?

What where the Emission Gas readings?
What is the standard to pass at your location?

You can Google exhaust gases & study what causes
the gases that were to HI & cause the vehicle to fail

Could be any number of things from a dirty air filter,dirty oil,
neglected ignition system,old failed exhaust converter,etc

You ALWAYS work on ALL Vehicles for a few days BEFORE
you go to inspection,then again, if they fail, using the exhaust
gases as your guide to resolving the area or system with the problem

Oct 28, 2014 | 1984 Mitsubishi Mighty Max

1 Answer

Pass smog test


change your oil and oil filter. Add a bottle of octane boost to the fuel tank then top off with fuel. Drive vehicle for about twenty minutes then have emissions tested. Unless you have a bad catalytic converter, you should pass emissions.

Apr 15, 2014 | 2001 Mitsubishi Eclipse Spyder

1 Answer

Fuse box 1998 mitsubishi diamonte


Couple of places to look, under the dash on both sides or under the hood on both sides.

Sep 19, 2012 | 2001 Mitsubishi Diamante

1 Answer

High Emissions output


did you fail a smog test? if you did... i always pass smog because i always have a new catalytic converter installed .if i was a little over the test, this usually gets me down a little lower and that's passing!

Apr 21, 2010 | 1994 Chevrolet Caprice Classic

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How do you fix a fuel evap in a 1994 Mazda B2300 truck. It is not passing smog.


sorry, to my knowledge there is no fix...there IS however a fuel additive available that will allow you to pass the Smog test...Google "pass Smog emissions test..."
Good Luck

Jun 15, 2009 | Mazda B2300 Cars & Trucks

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Won't pass due to emissions


O2 senser usually fail.
anything else fail??? did the inspectionstation tell you what need to be done to pass.??
do you have the print out of the inspection????
any machanic should be able to fix what ever the problem is.

Sep 25, 2008 | 1997 Nissan Sentra

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