Still smoking? what else to change?

[V8killR4U]

My car would leaves big clouds of black/gray smoke under part throttle or heavy accelleration. I changed the PCV and it seems to have cut down alot on the problem of leaving big James Bond Smoke cluds under acceleration. I do think that was 70% of my problem. If the car still smokes though what shoul I look at next. It never seemed to smoke like this when i first got the car, or at least i didnt notice really. Could there be oil in the in the Thorttle body or dog house? Is that even possible if the PCV went bad andwas sucking oil? Could it be my turbo or am i simply running to rich now? My gas mileage seems to kinda suck too! Am i too rich maybe?

 

[redhotrod]

Had the same problem, check your turbo. Do this by taking off your thottle body if you have a stock or TA series turbo and see if there is oil getting on that side(the compressor side, with the throttle body). If so, bingo, thats how your oil is getting burned out the tailpipes. While your at that point, see if the turbo has any side to side "slop". It should only be a very little little bit, if its more than that, time to rebuild that thing because your turbo bearings have had it.
If you have access to a compression gauge or better yet a leakdown tester, that would give you a real good idea how well your piston rings and valves are. If your readings are low, you might be sucking oil past your piston rings.
also check your plugs, see if there is any oil on those. I would check them before you drove it for the day to see if maybe your valve guide seals or guides themselves might be worn out.
Most likely though, if you got alot of miles on her, its gonna be that turbo.
Good luck!

 

[V8killR4U]

Thanks for the info Red, ill have to ttry that this weekend and see whats up.



Any other ideas out there?

 

[turbosam6]

PCV's don't go bad and suck oil, they go bad and either don't suck at all or allow boost to pressurize the crank case. If it sucks oil, replacing it won't help. Thats another matter altogether.

 

[BigTurbo6]

Maybe try a fresh O2 sensor as well.

 

[77tech9]

I have oil going into my intake (dont everyone have SOME) but it dont make the actaul exhaust black

Mainly at WOT I see a little bit of fuel burning in exhaust, but that's about it.