got a smog check, and failed! Options

[forkee]

i passed everything with flying colors except something labeled NO(PPM). it measured at 1115 when the max was 467. this was for the 15 mph test. it passed the 25 mph test reading only 55 out of a maximum 754.

here's the rest of the readings
15 mph
hc(ppm)
max/meas
61/15 pass

co(%)
.54/.00 pass

no(ppm)
467/1115 failed

25 mph
hc(ppm)
45/14 pass

co(%)
.53/.09 pass

no(ppm)
754/55 pass

anyone know any info about this? i have a safc2 but everything is zero'd out for the time being since my turbo is out. is there a setting i can use to fix this?? im bringing it in tomorrow to get it looked at and fixed.

visual inspection and functional check passed as well.

[Bitter]

it is possible the clean an egr valve and restore to back to a functioning state, but to do so you have to take it off the car. with carb cleaner and a metal pick CAREFULLY remove all the black carbon deposits from it that you can.

something that ive suspected causes some EGR valves to become clogged with carbon is people running higher octane fuel than the engine needs, i hear that this can cause excessive carbon buildup in the cylinder so it would make sense that it could also cause excessive carbon condensation in the egr.


yes, thats right. carbon in the EGR condenses out of the exhaust gasses just like water condenses out of the air. so perhaps a heat wrap on the egr could help keep it clear of carbon? it wouldnt hurt to give it a try if i had an egr valve i'd try it myself but my fed spec 7afe doesnt have one.