Passing Smog

10

Asked by Apr 28, 2011 at 02:24 PM about the 1993 Nissan Sentra XE

Question type: Maintenance & Repair

My Nissan Sentra 1.6L has 200,000 miles on it it passed smog two years ago with flying colors now the H/Cs are too hight did a tune up? It's at the 15 mph speed that the h/cs are around 150ppm anyone have any suggustions?

2 Answers

2,095

Hydrocarbons are fuel, which means you're not burning enough of the gas that's going into the cylinders of your motor. Try the following: Check the ignition timing is within the parameters detailed on the VECI sticker. Replace the distributor cap and rotor, and the spark plugs. Check that you have proper compression in all cylinders. Make sure you do not have any cracks in the intake tubing, or bad vaccuum lines - any unmetered air can cause a lean-mixture misfire that will result in a high hydrocarbon reading. If none of that works, you may need a new catalytic converter. Is the vehicle's check engine light on?

3 of 3 people found this helpful.

No

Your Answer

Add photo

Related Questions

  • Passing Smog 2 answers

    My Nissan Sentra 1.6L has 200,000 miles on it it passed smog two years ago with flying colors now the H/Cs are too hight did a tune up? It's at the 15 mph speed that the h/cs are around 150ppm anyone ...

    1993 Nissan Sentra XE

    -

    Maintenance & Repair

  • Passing Smog 1 answer

    HELP!!! My 1993 Nissan Sentra has 200,000 miles on it runs great replaced all the tune-up parts and the catalytic converter and it just barly fails emission test H/C's too high at 25mph can anubody ou...

    1993 Nissan Sentra XE

    -

    Maintenance & Repair

  • 1994 Nissan Sentra won't pass smog. What to do first? 5 answers

    The car was given to me after it was involved in a minor accident. It hwas current on smog and reg. but dmv requires smog for owner transfer. I put new radiator plus over flow tank, hood fenders etc...

    1994 Nissan Sentra Limited (1994.5)

    -

    Maintenance & Repair

  • My Nissan Sentra 2011 won't star I think fuel is not passing

    Yes make noise like the regular noise when staring the car, is like there is not passing gas to the carburetor or injectors, I change the cram sensor and the crank sensor but won't star, what happen...

    Nissan Sentra

    -

    Maintenance & Repair

  • passing smog 1 answer

    I have rebuilt the top end and have done a valve job. it will not pass smog. does anyone know of an adjustment that will reduce the fuel going to the throttle. it would seem that it is not burning a...

    1988 AMC Eagle

    -

    Maintenance & Repair

Search Nissan Sentra Questions

Nissan Sentra Experts

#1 L_R
L_R
Reputation 1,340
#2 Doran Harney
Doran Harney
Reputation 1,290
#3 Tom Demyan
Tom Demyan
Reputation 1,060
View All

Related Models For Sale

Used Nissan Altima
1,124 Great Deals out of 74,485 listings starting at $999
Used Toyota Corolla
929 Great Deals out of 65,938 listings starting at $1,995
Used Honda Civic
831 Great Deals out of 78,168 listings starting at $900
Used Toyota Camry
1,067 Great Deals out of 72,796 listings starting at $1,000
Used Honda Accord
997 Great Deals out of 62,552 listings starting at $999
Used Hyundai Elantra
530 Great Deals out of 41,766 listings starting at $795
Used Nissan Maxima
328 Great Deals out of 23,618 listings starting at $1,750
Used Hyundai Sonata
752 Great Deals out of 47,177 listings starting at $199
Used Volkswagen Jetta
569 Great Deals out of 41,868 listings starting at $700

Used Cars For Sale

2017 Nissan Sentra For Sale
19 Great Deals out of 34,150 listings starting at $11,750
2016 Nissan Sentra For Sale
78 Great Deals out of 2,733 listings starting at $9,300
2015 Nissan Sentra For Sale
110 Great Deals out of 3,285 listings starting at $6,877
2014 Nissan Sentra For Sale
193 Great Deals out of 4,037 listings starting at $5,890
2013 Nissan Sentra For Sale
67 Great Deals out of 1,706 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.