2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Carbon deposits = smoke on startup?

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Old Mar 14, 2002 | 03:28 PM
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Carbon deposits = smoke on startup?

K,
Basically self explanitory. I just want some good ole guess and good ole fashion know all. I don't give a **** if you know but just throw out some replys
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Old Mar 14, 2002 | 03:32 PM
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Well, you can always try the ATF trick and clean out your carbon deposists and see if it helps any. What color smoke is it?
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Old Mar 15, 2002 | 07:39 AM
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I really don't see how carbon deposits will cause the car to smoke. Especially if it's only smoking on startup.

Feel free to correct me if I'm wrong...
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Old Mar 15, 2002 | 07:48 AM
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Sorry for dbl post...

Moderator, pls delete
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Old Mar 15, 2002 | 07:55 AM
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my thought exactly rotarymiata

carbon deposits will cause hot spots and lead to preignition or detonation wont it? not smoke on start up. i believe the smoke on start up is do some oil staying or leaking in the combustion chamber after shut down or is it fuel.

i wish i could see thru my engine so i can tell how much carbon is there.
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Old Mar 15, 2002 | 09:08 AM
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isnt smoke on startup normal for the first few minutes till the engine warms up?
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Old Mar 15, 2002 | 09:24 AM
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The smoke could be from any one of a number of things, depending on what color the smoke is, or if it's even smoke at all.

Black smoke is oil ring or coner seal wear.

White, sweet smelling smoke can be a coolant leak.

Steam is the cat warming up to full operating temp.

So which is it?

- JB
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Old Mar 15, 2002 | 09:24 AM
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Originally posted by darkwaveboi
isnt smoke on startup normal for the first few minutes till the engine warms up?
ONLY when it's cold outside if you have your cats still on.
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Old Mar 15, 2002 | 09:36 AM
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mines steamy and smells like normal 'rx7' exhause
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