Honda Prelude 1998 blowing out excessive air when air cap is off?

-black residue particles have been climbing out from the exhaust and sticking on the bumper for a while now

-had 2 opinions for the PCV and its in good condition (thinking about changing to confirm this)

-ATTS light is on -- code 61 - o2 sensor (had it changed) / exhaust pressure (no idea how to fix this)



200,000km on the car/just had the transmission oil changed/distributor replaced/front o2 replaced



Anyone else had this problem and how did you solve it?Honda Prelude 1998 blowing out excessive air when air cap is off?
Air cap?? Try one of those carbon remover products. Don't stand behind the exhaustHonda Prelude 1998 blowing out excessive air when air cap is off?
Has your mpg changed?



Have you had the catalytic converter checked?