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misfiring / white smoke

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Vadim
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2016/01/19 11:57:11 (permalink)
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misfiring / white smoke

Hi guys. Could you help me please. I have MR2 with 3s gte gen4 engine.  Couple weeks ago while standing and idling after a good run I noticed a white smoke. I stopped the engine and turn it on again - smoke's gone. This time I was setting new audio unit and turning engine on and off a few timesIi noticed kind of misfiring. I unplug coils one by one,  it made it only worse  so it is probably not coils/spark plugs. I've been suggested to unplug 2 sensors next to throttle body so i did  and could not find any difference in RPM and it started to smoke again the higher RPM the more smoke  looks like burning coolant. I also added fresh 10 lt 98 fuel.  The engine running like a misfiring. Also I noticed   every time after the engine start it works 2-3 sec properly and than rpm drops. What this could  be? Is this the time  to change a  head gasket or may be something wrong with turbo. I believe engine has done under 100k as it taken from 60k Caldina  3 years ago by ex-owner. Just asking your suggestion before buying a headgasket kit and getting into engine. Also could you recommend a good mechanic in Parramatta-Blacktown area?
#1


3 Replies Related Threads
    track_mr2
    MR2 Scholar
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    Re: misfiring / white smoke 2016/01/19 12:27:48 (permalink)
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    Take the spark plugs out and see what they look like. Garage will be able to tell you if head gasket is leaking, they will do a  pressure test and see if coolant comes out the exhaust.
    #2
    Vadim
    MR2 Enthusiast
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    Re: misfiring / white smoke 2016/01/19 12:47:37 (permalink)
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    I did it and could not find any trouble. Light brown color/ maybe I wil rev the engine a bit and have a closer look. My main concern is turbocharger. If the coolant leaks through it somewhere as the turbo integrated in downpipe and quite hard to find a replacement.
    #3

    track_mr2
    MR2 Scholar
    • Total Posts : 411
    • Scores: 25
    • Reward points: 3342
    • Joined: 2012/09/17 15:42:32
    • Status: offline
    Re: misfiring / white smoke 2016/01/19 20:59:59 (permalink)
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    If your getting enough coolant in the engine to get white smoke it should be easy to find by a garage. I wouldn't buy anything till its checked out and diagnosed. If you have a misfire the cylinder doing it should have a black plug, the others should be brown. Need to take them all out and compare color. Best to find a GOOD garage and have them check it out. See if you can pull some ecu codes, I don't know about the gen4 engines but the gen3's you can just bridge the diagnostic port and see the flashes on the dash.
    #4
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