my 84 318i failed the state of ohio emissions test on the five gas test.
i passed all four parts except N.O. nitrous oxide the limit is 1400 p.p.m i am at 3000 p.p.m i have replaced the plugs. the tech said BMW's don't have a E.G.R. is this true and also if i replace the cat. converter and O2 senser would this correct the problem. please help i am stumped. thanks.

if your o2 sensers have never been replaced would'nt hurt to do it. catalitic coverter i wouldn't unless you suspect it being clogged. Just my thoughts :dunno:

I agree with 323imankiks
Go for the cheapter of the two . . . I had same problem with my other car, replaced O2 senor and tune-up and passed with flying colors.

I live in Ohio too . . . I know what your going thru . . .

Good Luck ! ! !
Skycity_BMW

if your o2 sensers have never been replaced would'nt hurt to do it. catalitic coverter i wouldn't unless you suspect it being clogged. Just my thoughts :dunno:
THANKS FOR THE HELP I WILL DO THAT CAUSE I DON'T KNOW WHEN OR IF IT EVER HAS.

I agree with 323imankiks
Go for the cheapter of the two . . . I had same problem with my other car, replaced O2 senor and tune-up and passed with flying colors.

I live in Ohio too . . . I know what your going thru . . .

Good Luck ! ! !
Skycity_BMW
THANKS FOR THE HELP....WHAT ABOUT THE A.G.R. VALVE DOES IT HAVE ONE ??????