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| Engineering/ Technical Ask technical questions about cars. Do you know how a car engine works? |
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#1
12-12-2002, 07:39 PM
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Black smoke with downshift
I was wondering if anyone has this similar problem and if they do what does it mean. I have a apex'i n1 catback which i think might make the smoke more obvious. It only does this whenever i take off real fast or shift at high rpm's. Everyone tells me when i'm racing that when i shift into second a black cloud of smoke shoots out. I wanna know who else this happens to or is it just me?
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#2
12-12-2002, 08:09 PM
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My car does that as well. I wouldnot worry about it. They are just Carbon Deposits blowing off.
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1989 s13 Fastback Tein HE coil-overs sr20det swapped! JIC Magic Front and Rear Strut Bars Slotted and Cross-drilled Rotors S/S Brake Lines Pivot Lazy eye controller Blitz LM Intake Blitz D1 Spec Turbo Timer Soon to come: Sard 550cc Injectors Blitz Nur Spec Exhaust Blitz Down pipe HKS FMIC http://www.driftmonkey.com (Part Owner)
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#5
12-14-2002, 02:19 PM
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if your burning oil then blue smoke would come out.
could it be your cat ? maybe its old and getting clogged, idk just a guess.
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#6
12-14-2002, 08:41 PM
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Yeah actually it could be the catalytic convertor because thats the only part of my exhaust I haven't replaced yet. I think its that and carbon deposits in my exhaust because i usually don't get the gas too much and when i do i think it's kinda cleanin it out. <- A good excuse to speed and accelerate real fast.
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#7
01-03-2003, 07:29 PM
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The other thing that it could be is a bad 02sensor in which your check engine light would be on or your fuel is running rich. But I bet it is just Carbon Deposits.
__________________
1989 s13 Fastback Tein HE coil-overs sr20det swapped! JIC Magic Front and Rear Strut Bars Slotted and Cross-drilled Rotors S/S Brake Lines Pivot Lazy eye controller Blitz LM Intake Blitz D1 Spec Turbo Timer Soon to come: Sard 550cc Injectors Blitz Nur Spec Exhaust Blitz Down pipe HKS FMIC http://www.driftmonkey.com (Part Owner)
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#8
01-30-2003, 03:53 PM
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If there is dark smoke coming from your engine, this is not good. The smoke is a sign that oil is getting in your cumbustion chamber. Not Good!!! Your valves could be warped. More than likely your oil seals are warped and are leaking oil. Anyway you look at, your engine is in need of maintanence. Its show its age.
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#10
01-30-2003, 04:05 PM
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I'M BURING OIL BAD...I REFILL ABOUT ONCE A MONTH NOW B/C I'M USING 20W 50
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The name's Adrian 1990 Civic HB Si - 265.7whp/223tq @9.2psi. Tuned on NepTune by J.Mills 1991 Civic Sedan DX - 296.3whp/230tq @1bar. Tuned on NepTune by J.Mills 1991 Civic Sedan DX - 185.8whp/139tq. Tuned on NepTune by J.Mills 2006 G35 Coupe 6MT - Stock 2011 CR-Z - Stock
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#11
01-30-2003, 10:54 PM
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Quote:
burning oil= blueish smoke burning coolant= white smoke running rich = black smoke Try doing tune up stuff like plugs, air filter, running some injector cleaner etc. All of these things can cause a engine to run rich if in need of replacement or cleaning.
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