SMOG PROBLEMS

  • Tiny
  • scooper08
  • Honda Passport

I have a 1997 Honda Passport (3.2L, V6 engine, 141,989 miles), and it has failed smog due to (very) high emissions, specifically "HC" and "NO" emissions. I had a diagnostic run on it, which identified Catalytic converter and O2 sensor problems, on the right side. I replaced the entire right side emission system (pipe, cat converter, O2 sensors), but the emissions reading came in even higher after that! I have replaced the air filter and added gas & oil treatments, apparently with no success. My "check engine" light is still lit as well (codes related to Cat, O2 sensor problems). Can anyone help!

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Wednesday, August 22nd, 2007 AT 8:06 PM

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  • Tiny
  • rasmataz
  • Member

We'll take this one @ a time

Check the EGR make sure its getting vacuum, also all passages clean of carbons.

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Thursday, August 23rd, 2007 AT 3:25 AM
  • Tiny
  • rasmataz
  • Member

We'll take this one @ a time

O2 sensor/s is it OEM parts?

Check the EGR make sure its getting vacuum, also all passages clean of carbons[/quote:9d8ad93128]

If the EGR system is leaking or inoperative, it can cause driveability problems, including detonation (knocking or pinging when accelerating or under load), a rough idle, stalling, hard starting, elevated NOx emissions and even elevated hydrocarbon (HC) emissions in the exhaust.

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Thursday, August 23rd, 2007 AT 3:39 AM

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