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cncmaster 09-20-2002 02:22 AM

blowing smoke
I have a a new 350 and just replaced the carb. It ran great at first. 4,000 miles later, its blowing smoke (when its cold) and it hesates when I give it a little gas. Is it the air/fuel mixture? If so how do I fix it?


woodz428 09-20-2002 03:18 AM

No info on the kind of carb, but the mixture ratio doesn't just go out after time/mileage. If it's a Holley you might check for a blown power valve, you really need to supply more info.

KULTULZ 09-20-2002 05:32 AM

[quote]It ran great at first. 4,000 miles later, its blowing smoke (when its cold) and it hesates when I give it a little gas.<hr></blockquote>

It sounds like it is in the enrichment (choke) circuit. Does it clear up once warm? How is the idle quality upon start? Does it have a choke pull-off/unloader.

And again, we need to know what kind of carb you have. Year and model of vehicle will help also.

bullheimer 09-20-2002 09:15 AM

how did you drive it for those 4000 miles?

dallam1 09-20-2002 10:36 AM

If the motor's running way rich, your eyes will sting and tear up while you at a stand still. If the engine is using oil, the oil level will go down noticably between gas fill ups and the blewish smoke will, well, smell like oil! Your PCV valve could be clogged causing oil (blow-by) to sneak past the rings. The oil pan could be overfilled causing the crankshaft to overly mist the oil in the crankcase and saturate the cylinders. I can't think of anything else right now but like everyone's saying, give us some more info to go on. Good luck

Ted655 09-20-2002 07:51 PM

Black smoke- fuel White smoke- water Blue smoke-oil. Some exceptions, but a good rule of thum.

78 monte 09-21-2002 12:57 AM

Maybe I never noticed the inner beutie of smoke befor but oil smoke is white too.Blue is the colar of jeans,the ocean,the sky etc...Never seen them come out of a tail pipe.

dallam1 09-21-2002 08:53 AM

Hey 78 Monte, You stick with us, man. You'll see all sorts of colors. I even see red when my wife tells me there's another little one the way. We're up to five of the little screamers! I know, I should go out and check the color of my tail pipe emissions more!!

notmrgoodwrench 09-22-2002 07:40 AM

hey man did you ever figure out what is causin all those kids....i did finally after 4 lol in my case it was the water i know it was so now i dont drink that crap aint had another one yet

dallam1 09-22-2002 08:08 AM

Hey Not Mr. Goodwrench; It ain't me man. It's my wifes old night gown that she wears with all of those worn out spots in just the right places. I wish she'd get rid of that thing!!

Croz 09-22-2002 01:03 PM

Hey ted, i had a gas leak that happened to fall on my Headers and it boiled off as a white vapor that came pouring into the car, my nose and throat hurt for 2 weeks after that one....

Ted655 09-22-2002 05:48 PM

That was...boiled gas, it should have had a green tint to it. :D

78 monte 09-22-2002 06:57 PM

Ever burn copper in a camp fire???

[ September 22, 2002: Message edited by: 78 monte ]</p>

jeff germano 09-22-2002 07:56 PM

I blow a little white smoke when i rev up the engine. Its a 350. But only when i give it gas why is that. its only noticable if you are behind strairng at the tailpipes.
What could it be

78 monte 09-22-2002 09:05 PM

How many miles on the motor???Do it use oil??Do it use coolant??Do it make bubbles in radiator??Do it only do it when you first start it??Do it make you annoyed when I keep saying do it??Do it??

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