hey everyone,

car is running great (740 gle), no problems, except on emissions, i fail miserably on NOx, but HC and CO are good.

this is what i've done:

replaced cat
replaced catback exhaust (mufflers, crossover pipe, etc.)
replaced manifold to downpipe gasket
checked timing @ 10°
replaced pickup sensor in distributer


i figure if there was a problem with the FPR, i'd be high on HC. and if the o2 sensor was bad, my HC would really be high. my only other guess is the AMM, but i wanted some input. i've done all the basic maintenance before the emissions test, plugs, cap/rotor, oil change, air filter. only other thing is i have a small exhaust leak that i can't pinpoint. i suspect it's a crack in the manifold, but am not that concerned as it is very small.

any input is greatly appreciated.