rtw118

well my bf was driving behind me the other day and he told me that there was black smoke coming out of my exhaust.

i assume this is a problem.

he thinks it may be from using oil thats too thin and it somehow slipped into the pistons and burned up in there. i think we used 5w-30 and i read somewhere that 5w-20 is recommended for 6th gens.

what else would cause this kinda thing to happen?

Stripped Honda

5w 30 is actually a thicker oil then 5 w 20 if it were oil bruning it wouldnt be black smoke it would be blueish grey..... what are your mods

rtw118

no mods, its just a stock '99 v6

GZERO

how is your air filter? dirty?

NiSMoCHiCK

black smoke would indicate that your car is running too rich.

try cleaning or replacing your air filter.

if it still persists, there could be something wrong with your injectors. In that case, run an injector cleaner through.

If that doesn't fix it, then you may consider having it looked at by a mechanic

Nick M

blue = smoke

black = fuel

white = coolant

YeuEmMaiMai

i thought it was blue = oil ehehehe althoguh blue = smoke works.........

YeuEmMaiMai

I would check your O/2 sensors

-RedneckDave-

I would bet money that it is your o2 sensors because my brothers prelude did that until we whanged his o2 sensors and it fixed the problem.

Razor

reset the ECU, let the computer reset the new air/fuel curve.

rtw118

its actually blueish smoke coming out, not black

maybe the seals aren't sealing so well anymore?

Stripped Honda

then your probally burning oil if it is blue smoke.... that is the first v6 that i have heard of having problems....

jweller

does it do it all the time, or just when you are hammering on it? cause if it only really smokes when you are in High RPMs that pretty much normal.