hi, my 94 ls400 , done 170000kms , recently just starting blowing white smoke, when i try to rev it, got more grey or blue smoke coming, the engine seems nt running on all the cylinds, and i gv headgasket test, it seems all good, nt use any water, engine oil very clean, i also clean the throttle body and check plugs, theyre fine. no engine check light on the dash.
anyone got same problems before or anyone can tell me whatelse could b wrong?
thx a lot!

 

If it's white smoke then your probably getting water into the intake/combustion chamber(s). Did you drive thru any deep/standing water and force some into the intake?

 

no, never been drive thru any deep water, the only staff force into the intake is those throttle body cleaner or system cleaner.

 

is your power steering fluid level good?

 

It could be that you are getting power steering fluid in your intake chambers via the power steering control valve. Follow the vacuum lines to the power steering....

Also, this problem has been tackled so many times and using the search option will show all the right hits.

 

power steeringfluid does godown a lot, i will check it out, thx

 

hi, those 2 vacuum hoses which goes onto intake looks pretty dry inside , is that mean no power steering fluid goes into da intake?

 

Power steering fluid should "NOT" go inside the intake manifold. What you have means the power steering fluid is going inside the intake manifold. Your car has a malfunctioning "control valve" (where the vacuum lines are connected). You can change that or plug it.

 

i blew smoke for about a year until i replaced my valve guides. now she's fine.

 

thx 4 that ,where i should plug it? the vacuum hose onto manifold ot plug from control valve. any1 can show me the pics, thx a lot

 

I don't follow the logic from garage7 if I understand correctly ta2 is saying that there is no evidence of power steering fluid in the vacumm lines so how does that mean that it is leaking? I would say the opposite.

Ta2 figure out where the power steering fluid is going. Do a search on the control valve (its all over this site ) and then figure out if that is the issue. I would think there should be evidence (traces of ) power steering fluid in the vacumm line. Maybe check it after the car has been sitting for a while before you start the engine

 

thx , i checked it , it seems no power steering fluid goes into the manifold, whatelse could cos the smoke? thx

 

yes I agree with thermactor but your power steering fluid must be going somewhere if the resevoir keeps going down.

 

but if its valve seals, should b blue smoke, it is white

 

done that, today wen i did oil change , can smell da petrol in it , so i rekon could b overfuel, so , took da ECU out, send away c how it goes, thx