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04-16-2009, 03:06 PM | #1 |
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Puff of white smoke in hard throttle... Smells like oil...
Ok, I had a freind behind me today and he saw a puff of white smoke at WOT and he said it smelled like oil. The car runs great and has not CEL or codes in it.
List of mods: AFE intake Split Second Tuner Ultimate Racing Down Pipes catless O2 Sensor eliminator.. Any ideas? I think it is ok but want your opinions....
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04-16-2009, 03:12 PM | #2 |
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Catless downpipes can make your car have a slight odor under WOT conditions... The first set of cats are not their to help clean the exhaust gas before it goes out into the atmosphere.
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04-16-2009, 04:43 PM | #3 | |
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04-16-2009, 08:27 PM | #8 |
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04-16-2009, 08:43 PM | #9 |
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Thanks for the input guys. I spoke with my freind again and he said it was a puff of light white smoke not a dark smoke.... If it is coolant, that would not be good at all. Wouldn't I have some kind of check engine?
He also said it didn't last long just a puff when it went to WOT...
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04-17-2009, 07:16 AM | #12 |
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I agree that if it's white smoke, it's probably coolant. The cause is likely a blown head gasket, which is allowing coolant from the water jackets around the cylinder to get into the combustion chamber. When the coolant burns, it emits white smoke from the exhaust.
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04-17-2009, 07:39 AM | #13 | |
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Athough that is what causes white smoke, it should be continuous and not brief or intermittent in the case of a blown headgasket. I doubt this is what's happening in this case. Don't scare the guy sh1tless for no reason. |
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04-17-2009, 10:21 AM | #14 |
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I highly doubt it is HGF...check for mayo-like substance under oil & coolant caps...this is the result of oil & water mixing. MY bet is that it is just some oil burning off or its running rich.
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04-17-2009, 10:31 AM | #15 |
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04-17-2009, 12:28 PM | #16 |
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Couple things....
1) it was a puff of smoke and he followed me for 10 miles without it happening again.. 2) I have had a blown head gasket, it was not a BMW, but when I had the issue I could smell coolant. I am pretty sure it would be running rough and have a different sound to it if it was a head gasket but my car is runnning great and sounds great. My theory is that since I am running catless downpipes my car thinks that I need more gass causing it to be running rich. I am not a 100% sure but I think the o2 simulators only fix the check engine light and do not address the actual o2 reading. If this is the case then I my engine is running safe with only a less MPG... Do any of you think I am on the right track....
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04-17-2009, 09:15 PM | #17 |
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Personally, I think it's gasoline. If it were a head gasket, etc, there would be a lot more white smoke with a distinctive smell.
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04-18-2009, 06:24 AM | #19 | |
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There are 4 o2 sensors on the car. The front two (pre cat) are wideband o2 sensors. These monitor your a/f ratios. The rear two o2 sensors (which the o2 sims are for) are there to check to see if the cat is working. It does not affect a/f ratios.
I wouldn't worry about the smoke. It's probably condensation. If you're continously blowing smoke or blowing smoke everytime you go WOT, then it's something to worry about. Quote:
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