k, had the HG doen at dodge, about 5K, ago, the decked and so fourth..
i also changed pcv valve and o2 sensor bout 5 k ago.. now my exhaust is still smoking a lil white and smells weird .deff not oil.. i checked my cooland and oil since i jus did the change. and no mixing is goin on.. the coolant is green as go. all the levels are pretty much the same. and oil is fine.. heres a vid of the smoke, i let it idle for 15~20 min with mild reving here and there...

http://media.putfile.com/exhaust-30-19

comp test after hg was 180 all across. im not seeing any oil loss, wtf what do u think.. i also cant pass smog:

mph hc ppm (max) meas co%(max) meas no ppm( max) meas
15 ( 56 ) 140 (.51) .31 ( 443 ) 605
25 ( 40 ) 68 ( .49 ) .20 ( 730 ) 290

what do u think
96 420A a/t

Is this white smoke coming during idling for extended periods? If it shows up when you're making your way through the drive through, but goes away at speed, it's likely leaky valve seals. Not sure how that would pertain to smog, but it will definitely result in smoking at idle. I'd suggest a leak down test.

If you're sure it is not oil and you are not loosing coolant, it definatley could be the cat because of the emissions thing. Mine had white smoke as well and smelled almost gassy/sulfury when my cat went. I got a brand new Pacesetter High Flow cat from ebay for about 150 I think it was.

-Nate

___________
-88 Mercury Tracer 1.6 3spd auto
-95 Eclipse GS 5spd
-Mods: Megan Header, Megan Cat-Back, Pacesetter High-Flow Cat, AEM V2, Fluidyne Radiator, Hurst Short Shifter, Prothane Motor Mounts
-All-Motor Buildup on the way
-VIS Invader hood, R34 front, Halo Proejctors, M3 LED Mirrors, Projector Fogs, Blue Heater Hoses