hi, this is my first time failing a smog test with my 93 fd, i don't really get the meaning of the numbers from the result, can somebody take a look at the result, and tell me what could be wrong with my car?? and how bad is the result?
thanks

15mph (1853 rpm)
(%CO2)-14.5 (%O2)-0.8
(HC ppm max 88)-meas 79
(CO% max 0.52)-meas 0.07
(NO ppm max 704)-meas 788
fail

25mph (2041 rpm)
(%CO2)-14.7 (%O2)-0.5
(HC ppm max 53)-meas 61
(CO% max 0.50)-meas 0.11
(NO ppm max 738)-meas 649
fail

 

and my car has a aftermarket cat back and a downpipe,, everything else stock..

 

PM Wackyracer. He'll help you with smog concerns.

 

first time failing? damn thats pretty good. LMAO

 

This is in the 2nd gen faq, but it might be useful.

https://www.rx7club.com/showpost.php...06&postcount=4

 

How old is your catalytic converter? you only need 1 good working cat to pass. Is your Air Pump working? Looks like your NOX is a little higher at 15MPH, try cleaning the EGR valve. I'd also replace the O2 sensor if your not sure when it was last replaced, hope this helps

 

doze numbers indicate you have a vehicle that will Kill People and Animals around it.

 

call me for your smog issues

213/867-5309

 

gross polluter!!
the link helps but there a other problems it did not mention...
hydroncarbons are high(faulty ignition system not firing, vacuum leaks)
NOx-engine operation leaner/hotter than normal,vacuum leak,over advance timing,
CO-rich A/F mixture
just a couple things to look at..but that should get you through...also your air pump might be stuck or full of carbon from the hose also clean if some vacuum hoses look brittle or piece in off clean the inside of the nipple and replace hoses...