Hey.. a friends car is smoking on decel only, no during accell, idle, cold etc.. Just on decel after he does a WOT pull or is just driving without letting off for awihle (highway driving).

Car runs/starts fine, does use much oil. Engine recently seen nitrous, but smoking problem was consistant before/during/after.

Whats the problem?

 

i thought on decel that would mean valve seals. its been a while since ive been into troubleshooting cars though. memory is fading too.

 

Likely valve seals. Decel/cruise is when engine vacuum is highest.

 

alright thanks, ill get him to do a leakdown.

 

lol, a leakdown has nothing to do with valvestem seals.

 

yeah i guess not.. doh.

 

" recently seen nitrous" start there, the answer will come to you.

 

i'm having the same problem. new oem valve seals coming soon
should be better for sure.

 

Wow, you don't seem to bright judging by your spelling rex. How long have you had the teg?I used to have a 96 GS-R, lookin for a 4 door civic now. I don't think i've ever seen you round at all.

 

i believe don is referring to oil control rings.

though if it is valve seals you would see it on cold starts

 

This happens a lot, from what I have seen it is a problem with rings, out of round or damaged cylinders. Or all of the above.