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94 nissan quest fail smog unstable @ 15 mph - Nissan Cars & Trucks

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Failed for what Gas?
What are the limits & what did your vehicle
put out.
It passed Idle Test but not run at 15MPH
This is Federal or California testing

Posted on Jul 22, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

jasperoni
  • 203 Answers

SOURCE: my c220 failed smog because of high hydrocarbons at 25 mph

hc's are unburned fuel- I would change my sparkplugs and resmog it if that is the only gas that was high

Posted on Jun 01, 2009

alicantecoli
  • 22095 Answers

SOURCE: failed smog test

trade it in on the scrappage scheme against a new one .or take it to an authorised garage for emmisions ,cant just point a finger at a certain component and say change that .Sorry but without the right equipment i would only be making educated guesses .What condition is the air filter in ---did you clean it before you went for the test

Posted on Sep 11, 2009

  • 507 Answers

SOURCE: 94 corolla failed va emissions.

get the air fuel mixture leaned off as youre so close it should work any decent mechanic can do it and its easy

Posted on Nov 04, 2009

  • 12 Answers

SOURCE: 1987 honda accord lx failed smog 2nd time. even

true the EGR can really make a change and it should have been the first thing too look at because its the cheapest and easy to install

Posted on Feb 19, 2010

HondaCRX
  • 252 Answers

SOURCE: I have high emission on my 1998 nissan quest how

Hi there

There are a few ways you can do this:

Use ultra-low sulphur fuel (not sure if the US has this but the UK does).

Change or clean out the air filter (check my profile for a how-to)

Make sure the EGR valve is connected up properly. This is the exhaust gas recirculating valve, located on the intake manifold. Unbolt is, clean it out with a wire brush and carb cleaner, refit.

Get the Nissan checked again, if it is still high, the catalytic converter could be due a change, especially as it will be 12 years old.

Hope this helps, please vote if so. Thanks :)

Posted on Jul 13, 2010

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trade it in on the scrappage scheme against a new one .or take it to an authorised garage for emmisions ,cant just point a finger at a certain component and say change that .Sorry but without the right equipment i would only be making educated guesses .What condition is the air filter in ---did you clean it before you went for the test

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