Smoke at startup
#1
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Smoke at startup
My 91 LS400 with 150K miles currently has smoke at startup. Someone in this forum said that something to do with the idle-up valve on the steering pump. My Lexus dealer told me that they've never heard of that thing before (they think that US model may be different from Canadian model), besides the steering pump in my car is only two years old.
I really want to fix this problem because it's embarrassing to see smoke coming out from such a nice car, but I'm stuck. HELP!
tvd51
I really want to fix this problem because it's embarrassing to see smoke coming out from such a nice car, but I'm stuck. HELP!
tvd51
#2
Where is the smoke coming from? Engine bay or tail pipes?
If it's coming from engine bay, then you have some oil seeping onto headers while the car is cold. Once you start it, headers worm up and burn the oil off in the first few minutes.
If it's from tail pipes, then the list of culprits is too long...
If it's coming from engine bay, then you have some oil seeping onto headers while the car is cold. Once you start it, headers worm up and burn the oil off in the first few minutes.
If it's from tail pipes, then the list of culprits is too long...
#3
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The smoke comes out from the tail pipes (only at startup after being shut down for several hours). The usual cause of this is that the piston rings are slightly worn out and oil gets to the combustion chamber after the engine stops running. I hope this is not the case because it's expensive to fix and this engine is not supposed to have this problem at 150K.
tvd51
tvd51
Last edited by tvd51; 01-08-04 at 03:51 PM.
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what was the original problem you were having that you had to replace the egr modulator and how much was it? also where is it located? thanks.
tvd51
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