1993 Honda Accord Q&A

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

what repair is needed to correct this problem -
Answer 1
Timing and vacuum leaks are typical repairs. Is the cat original? -
Comment 2
Timing, EGR passages clogged or the cat will cause high NOx. Rainbow's in Hayward, make the call... -
Comment 3
yes the cat is original, is it possible that the EGR is no good ? -
Comment 4
It might be the passages, not the vale. They get coked up and clogged. -
Comment 5
could the intake control soleniod valvecause nox by not getting enough air flow -
Comment 6
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. -
Answer 2
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 -
Answer 3
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..... -
Answer 4
hHi repair pal question about my 1993 honda accord failing smog,could the intake control soleniod valve cause to much noxs -
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