Blue smoke out exhaust at WOT intermittent
Hello,
Just noticed I have blue-ish colored smoke exiting out of my exhaust at wide open throttle sometimes. The doesnt smoke on start up. I do premix sometimes, about every 2-3 fill ups 8oz per full tank. Stock OMP is hooked up Is it normal for this smoke to be exiting the back of my exhaust? My mods are Power FC DP, MP, Cat back Non-sequential twins |
car comp tested at 90 psi all rotors.
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any thoughts??
bump |
My best guess from years of reading the FD forums would be oil seals in your turbos going bad. Do you have oil in your intercooler plumbing?
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your obviously burning oil from somewhere
even if you have good compression there is going to be some mixture of the oil in the combusion chamber due to the OMP but it shouldn't be noticeable. i'd say check your turbos. i even have oil blow by in the intercooler piping but i don't have blue smoke. there should be a negligible amount |
I just had the car modified from sequential to non sequential...
How long will the turbos hold up approximatly before they start to under boost..? |
blue smoke = oil
white smoke = coolant |
whether they are sequential or not will not determine their life expectancy
only how many miles and how much boost you are running on them will |
Ok
i took the car out again today, and i just wanted to make some changes to my original post. the smoke is gray smoke... most of the times it will shoot out of im doing hard pulls... usually i see the smoke almost like it is igniting when i let off the gass after a hard pull. there will sometimes be a trail of greyish smoke. Could my tail pipe possibly catching on fire? im running 12 psi on the turbos, they are freshly ported, not new turbos but pretty decent condition |
Check to see if your pcv valve isn't in backwards. I had this exact same problem due to it being in backwards!
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Is it necessary to let the car sit at idle before you shut it off?
i used to do this when i first got my car then i herd it was unecessary. so i stopped doing it. I just drive off boost for the last 5 mins before i put away the car. Letting the car idle and letting oil flow through the turbos and getting all of the oil out of the turbo is really necessary ? Can someone explain what the exact purpose is when letting the car idle for the turbos? If i just shut off my car and not let it idle long, and if oil is still inside my turbos or whatever, could this be sorta causing my light trail of smoke out the back of my exhaust once in a while ? |
the whole point of letting the car idle before you shut it off is so the turbo housings or manifold doesnt crack due to sudden cooling
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Originally Posted by wb123
(Post 8549596)
Ok
i took the car out again today, and i just wanted to make some changes to my original post. the smoke is gray smoke... most of the times it will shoot out of im doing hard pulls... usually i see the smoke almost like it is igniting when i let off the gass after a hard pull. there will sometimes be a trail of greyish smoke. Could my tail pipe possibly catching on fire? im running 12 psi on the turbos, they are freshly ported, not new turbos but pretty decent condition |
Originally Posted by tt7hvn
(Post 8555787)
the whole point of letting the car idle before you shut it off is so the turbo housings or manifold doesnt crack due to sudden cooling
regular driving with a few boost runs... and then when i am full out driving hard and boosting more often... is it necessary to get turbo timer to avoid cracking of the turbo housing or manifold? |
Originally Posted by wb123
(Post 8555821)
How long should I let my car idle after:
regular driving with a few boost runs... and then when i am full out driving hard and boosting more often... is it necessary to get turbo timer to avoid cracking of the turbo housing or manifold? |
Dumb question here
but i cant remember off the top of my head if the stock twins 93 are oil and coolant cooled or if its just one or the other..? |
you sure it is grey? sounds exactly like secondary turbo seals are givin in...
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Originally Posted by wb123
(Post 8556134)
Dumb question here
but i cant remember off the top of my head if the stock twins 93 are oil and coolant cooled or if its just one or the other..? Dave |
Originally Posted by DaveW
(Post 8555972)
HAHA... Sorry. I didn't realize you started that thread, also. So why did you ask the question again? Dave |
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