» » »

Honda Q&A

Ask Your Question

1993 Honda Accord Question: my 1993 honda accord fail smog to much nox

 

Question

low rider, 2.2L 4 Cylinder, Hayward, CA, March 08, 2011, 17:32
 Rookie

what repair is needed to correct this problem

4 Answers
Flag This
  • Answer #1

    Hal... (see my shops), March 08, 2011, 17:35
    Profile_thumbnail
     Master

    Timing and vacuum leaks are typical repairs. Is the cat original?

    Flag This
  • Reply

    low rider, March 08, 2011, 17:45
     Rookie

    yes

    Flag This
  • Reply

    Hal..., March 09, 2011, 10:10
    Profile_thumbnail
     Master

    Timing, EGR passages clogged or the cat will cause high NOx. Rainbow's in Hayward, make the call...

    Flag This
  • Reply

    low rider, March 09, 2011, 16:24
     Rookie

    yes the cat is original, is it possible that the EGR is no good ?

    Flag This
  • Reply

    Hal..., March 09, 2011, 16:27
    Profile_thumbnail
     Master

    It might be the passages, not the vale. They get coked up and clogged.

    Flag This
  • Reply

    low rider, March 15, 2011, 15:51
     Rookie

    could the intake control soleniod valvecause nox by not getting enough air flow

    Flag This
  • Reply

    Visitor, March 15, 2011, 16:25
     Rookie

    IAC Valve is only to control idle when your foot is off the gas pedal like when you're stopped. I let's air get into the engine while the butterfly is still closed.

    Reply
    Flag This
  • Answer #2

    Vickersautorental from Vickers Auto Repair and Auto Rental of San Jose, March 08, 2011, 18:07
    Profile_thumbnail
     Enthusiast

    95% of the time high NOX only is caused by a malfunction in the EGR system, if you want to bring it by, we will take a 15 min look at the vehicle at no charge

    Reply
    Flag This
  • Answer #3

    Rainbowauto from Rainbow Auto Center, March 09, 2011, 09:14
     Enthusiast

    Check the egr systme first,common failure with the control valve,timing check cause you don't want to over look simple thing.. Third possiable bad catalitic converter...
    I would check the easy stuff first, timing,egr passage clogged,egr signal and cataltic converter.....

    Reply
    Flag This
  • Answer #4

    Visitor, March 15, 2011, 15:37

    hHi repair pal question about my 1993 honda accord failing smog,could the intake control soleniod valve cause to much noxs

    Reply
    Flag This