after i make a wot run thru a couple gears my exhaust pukes some blackish smoke for a bit on decel. any ideas what that is?

i know sometimes when u go wot its normal for a puff of black smoke to come out. this is different. this is on decel.

 

after talking to ihor, i think thats his name. i think the problem is the pcv valve. i am gonna pull it off tonight and see if it only blows in the direction of the arrow only. if anyone else has something to add please share....

 

Try the pcv first. If not then I'd look into installing a catch can. You turbos could be getting tired and pushing oil.

 

id tend to suspect your runnin rich first with black smoke...

 

It could be your turbos. after I ran 15 psi on my twins for about a year they started to behave similarly. Mine had around 90k miles, I know yours have lower mileage, so hopefully that's not your problem.

 

gotham also suggested that i run 20 50 oil rather than the 10w 30 that i have been running successfully for 6 yrs now. anyone confirm this??

i also think i could be ruinning rich as well. but when the car was tuned a few yrs back it didnt do this. this problem just started last week.

anyone know in general terms the life of the pcv valve? i know mine ios original. i read oin here while searching that these are replaced when a car is tuned up.

i took the wife out for dinner tonight so i didnt get a chance to test my pcv but i will be doing this first thing tomorrow

also rich, i am not ruling out the turboes as i have been running 15psi for 3 yrs now atleast. but this problem only occurs on decel. no other time. i was under the impression that if it was the turboes it would happen even at wot. hit me up on im later if u are free...wanted to pick your brain on a few things. i was already bothering ihor earlier...lol.

anotyher thing i need to do is replace my 02 sesor. i have been running catless for 5 yrs now. i am sure that sucker needs replacing. that might cure some other smaller issues i am having. is the 02 sesor accesssible from under the car? is this an easy job?

i plan on spending some time on the car tomorrow or this week as i am on vaca from work so this maybe something i could change out myself. i think guys are using autozone 02sensors?

tks for the feed back guys!