Question about Acura Integra

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Runs rich Failed smog four times due to high hydrocarbon levels (need to be a maximum of 87, mine was 90). Smog tech says it's running too rich. How do I "lean it up" a bit?

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How can you fail more than once?

After you fail, you go to a repair shop &
resolve ALL Vehicle issues

Then the shop road tests until all 8 I/M Monitors
run clear ,or there is no reason to go back to inspection
knowing your going to fail.

The problem is the shops & peoples inability to explain
what they need taken care of.

If you never work on the vehicle for years,then you don't
go to inspection,it is a given you will fail

Spark Plugs-every 3 years
Check for Cylinder Misfires
Always install a New Air Filter before inspection
Always install new fresh full sys oil before inspection

Oxygen Senors get replaced every 100,000 miles

Have to road test with professional scan tool & look at
all data,check monitors,fuel trim,O2 etc & check for codes

You have to spend the money to evaluate the vehicle, to see
if it is ready to go for inspection,not many are,their just driven
& neglected

Rich could be-- O2 Sensors,Dirty MAF Sensor,Vacuum Leaks,
Injector Leaks & more,I have seen a dirty air filter fail a car

Posted on Mar 27, 2014


6 Suggested Answers

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Posted on Jan 02, 2017

  • 3051 Answers

SOURCE: 2001 Sonata V6, Smog failed - high NOX

if i were you i would contact cragen and ask them if the car has it and how much the replacement part is

Posted on Aug 19, 2008

  • 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

  • 4 Answers

SOURCE: failed smog 1993 honda del sol s 1.5

Sounds like the O2 sensor. Post the smog test results (if you have it from the exhaust). When the O2 sensor fails the exhaust doesn't get recycled (reburned) so it goes out the exhaust. With more oxygen the fuel burns better,.

Posted on Jul 24, 2009

  • 749 Answers

SOURCE: high nox fail smog test any remedies? 99

NOX is created when the internal combustion temperature gets to high.The egr system uses burnt exhaust gases to line to cylinder walls.The purpose of this is decrease internal combustion temperature therefore reducing the amount of NOX created.Would look to a possible egr malfunction usually they will trigger the check engine light but not always.The 4.3L has been known to have issues with carbon buil up in the egr and the egr pintle not open and closing properly.

Posted on Jun 07, 2010

  • 456 Answers

SOURCE: High HYDROCARBONS on emissions test. I

first thing to do is change the air filter. even if it appears clean, the airflow can be blocked enough to affect the petrol air ratios in the engine which will give high HC readings.
changing the spark plugs can give a cleaner spark, and better ignition, with lower HCs. high HCs could also be caused by traces of oil getting through worn piston rings and valve stem seals and burning in the combustion chamber. there are many oil additives that can help stop this and reduce HC levels as well.
hope these suggestions help

Posted on Aug 28, 2011

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