Supra Smoking?

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Thread: Supra Smoking?

  1. #1
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    Supra Smoking?

    My 94 single turbo supra smokes a little on start up... It smells like fuel and a little oil, could this be anything really bad, or is it running really rich and needs a tune, which it does, to fix the smoke? When running regular you can smell a ver potent fuel smell coming out of the exhaust, but no smoke... what should I look for or listen to??

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    SupraForums Member joeBPUsupra's Avatar
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    a common problem in supras are the valve stem seals usually need to get replaced. does it only smoke during start up?

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    lol.... yeah common... you sounded scared...

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    why are you running regular?!

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    Quote Originally Posted by tacoboy View Post
    why are you running regular?!
    i dont think he means regular as in fuel, but regular as in normal driving.

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    It smokes only during start up for like 3 seconds, and it is like 2 seconds after the motor has started, besides that it does not smoke the rest of the time it runs.

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    Smoke

    Yes, this is the same problem that i have. The valve stem seals. It's does no damage to the engine, so no hurry to fix. But i agree it doesnt look good.

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    it smells a lot like fuel, I am on the stock fuel system and a stock computer... with the single turbo i didn't think it was that great of an idea, could my injectors be dumping on start up, or could it be old fuel i am burning off on start up.

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    Quote Originally Posted by Roger Supra/Rx7 View Post
    It smokes only during start up for like 3 seconds, and it is like 2 seconds after the motor has started, besides that it does not smoke the rest of the time it runs.
    That is not that bad
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    Quote Originally Posted by Roger Supra/Rx7 View Post
    My 94 single turbo supra smokes a little on start up... It smells like fuel and a little oil, could this be anything really bad, or is it running really rich and needs a tune, which it does, to fix the smoke? When running regular you can smell a ver potent fuel smell coming out of the exhaust, but no smoke... what should I look for or listen to??
    Do you have a wideband (you should)? We need to know if it is oil or fuel that is causing the smoke. If it is oil, then it could very possibly be the valve stem seals like people have said. If it is fuel, then it could be a lot of things. Do you have any leaks in your piping or vacuum lines?

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    I very well may have leaks in my vacuum lines... would this cause the car to overcompensate and dump fuel and oil?? Also if it is the stem seals would it be a disaster to fix or not so expensive. Also does the fact that i dont have an oil catch can make it likely to burn oil??

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    Quote Originally Posted by Roger Supra/Rx7 View Post
    I very well may have leaks in my vacuum lines... would this cause the car to overcompensate and dump fuel and oil?? Also if it is the stem seals would it be a disaster to fix or not so expensive. Also does the fact that i dont have an oil catch can make it likely to burn oil??
    If you do the stem seals yourself, not expensive at all~ $150 for parts. It does take some time though. Apparently, as told by my friends, my car smokes too, but during hard boosting~ maybe turbo seals going bad?

  14. #13
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    You really should be searching because most of these questions have been answered. Valve stem seals are easy if you take it to a shop that knows how to work on Supras.

    As for your other problems, it sounds like your Supra has not been maintained very well. I would do the general maintenance on it, like replacing the vacuum lines and going over everything very theroughly. We can't see your car and you refuse to give us detailed information about your setup and what is wrong. The search button will reveal all the info you need.

  15. #14
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    Quote Originally Posted by Roger Supra/Rx7 View Post
    I very well may have leaks in my vacuum lines... would this cause the car to overcompensate and dump fuel and oil?? Also if it is the stem seals would it be a disaster to fix or not so expensive. Also does the fact that i dont have an oil catch can make it likely to burn oil??
    Its the valve seals...not costly to replace.

  16. #15
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    The problem was BLOWN TURBO SEALS lol thank god it wasn't a valve stem seal job.

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