LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Can having No cats and no emissions on a car make it smoke a little at high rpms?

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Old Aug 16, 2003 | 02:03 PM
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TexasTechTA's Avatar
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Can having No cats and no emissions on a car make it smoke a little at high rpms?

My car has no cats and all emissions parts are removed. can having this done make the car smoke white slightly at high rpms? it is not that much but let me know what you think?
Old Aug 16, 2003 | 02:23 PM
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weird u say this... my car in sig, no egr no air no cats.... well 1 hollow one now anyways I got on it with high rpm's and my gf behind me said white smoke came out..... weird as hell..... I'd like to know this also....
Old Aug 16, 2003 | 03:06 PM
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Originally posted by Hyperspeed97z28
weird u say this... my car in sig, no egr no air no cats.... well 1 hollow one now anyways I got on it with high rpm's and my gf behind me said white smoke came out..... weird as hell..... I'd like to kno
w this also....
Did your car ever get any white smoke before you did all the emmissions removal?
Old Aug 16, 2003 | 03:33 PM
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I get that on start up sometimes(when motor is hot). I beleve it just raw gas burning of in the exhaust. as for yall guys it might me a head gasket leak. I know for a fact mine doesn't have a leak.
Old Aug 16, 2003 | 03:45 PM
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it is a veyr small amount of smoke barely noticeable. also if it was a head gasket problem. I would be loosing coolatn right? and also the oil would look milky which neither symptoms have occurred.
Old Aug 16, 2003 | 04:53 PM
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It could be running rich, could be a slight head gasket leak, or even some blowby from the rings. I'd keep an eye on the coolant and oil, if neither go down, then I wouldn't worry about it.
Old Aug 16, 2003 | 05:20 PM
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Originally posted by TexasTechTA
it is a veyr small amount of smoke barely noticeable. also if it was a head gasket problem. I would be loosing coolatn right? and also the oil would look milky which neither symptoms have occurred.
You would only be losing coolant if the gasket problem was near coolant passages.
Old Aug 16, 2003 | 06:00 PM
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Re: Can having No cats and no emissions on a car make it smoke a little at high rpms?

Originally posted by TexasTechTA
My car has no cats and all emissions parts are removed. can having this done make the car smoke white slightly at high rpms? it is not that much but let me know what you think?
To be to the point....no. The emissions system has no effect on "smoke", so not having it won't cause that.
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