12-12-2020, 10:00 PM | #1 |
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Lots of smoke coming out of o2 sensor (vid included)
Hi guys! Above is a video of the problem I'm having. N55, upgraded fmic, intake, exhaust, catless downpipe, MHD stage 2+. For the past 3-4 weeks the car has smelled like there was plastic burning somewhere. About 2 weeks ago after driving the car moderately hard, a decent puff of smoke came out of the hood when I went to park. I looked around and noticed there was a small leak from my VCG, so I replaced that about 6 days ago hoping that would fix the problem. I pressure washed the downpipe and the o2 sensor to get all the old oil off as best as I could. After another moderately hard drive today, the car started smoking again and I recorded the video above. Any suggestions as to what it could be? It smells like burning plastic. |
12-13-2020, 10:51 PM | #5 | ||
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Hi, I replaced the valve cover gasket a week ago and when I had it off fully checked the valve cover and everything looks great.
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This Tuesday I'll take the downpipe off and completely clean all the old oil residue off. |
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11-15-2021, 06:59 PM | #7 |
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What did you find blakekald ?
I'm having the same thing happening on my F22 with N55 engine. I have also just replaced the VCG because I thought it was the main reason for the smoke. For my case, I have hand wiped the O2 sensor with rubbing alcohol and it is all nice and clean. I used my bare hand to feel around and smelled my fingers and there were no oil on it. But, after the engine warms up, smoke start to escape from the O2 sensor again and it has a burnt smell. I have a new O2 sensor ordered and it is on the way.
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11-15-2021, 07:26 PM | #8 | |
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11-15-2021, 09:02 PM | #9 | |
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02-01-2022, 04:05 PM | #10 | ||
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03-20-2023, 07:19 AM | #13 |
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Valve cover leaking
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09-19-2023, 05:49 AM | #17 |
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Did you clean the heat shield when replacing valve cover? Oil could still be there and drip on the downpipe
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