i just got a rebuilt 350 (carbed) put in swapped from a 305 (carbed) and well when i start it up it smokes quite a bit, i keep on asking the installer and he keeps on coming back its my carb because its running too lean. its a stock qjet from the 305. also during heavy accel it starts to smoke. i also heard something about seals somewhere i can't remember tho if you have the same prob of know what i could do to fix it or what not please help me out.

thanks

 

anyone have any ideas on what it could be or isn't?

 

what color is the smoke. blue. white. black. blue that means oils getting into the combustion chamber via. valve guieds are worn. or bad piston rings. but this soudns liek ti's your carb it's running ethier lean or rich. get it tuned

 

black on accel white on startup

 

anyone know how to post a video ? if so i can show ya what it does.

 

Ok, stop taking it to this guy. For starters, Black smoke indicates a RICH condition, and the white smoke indicates coolant being burned. I have also seen white smoke on startup from carburated cars running too rich. Get that carburetor rebuilt, and adjusted properly. Until you can do so, check the choke to make sure it's operating correctly. Linkage and all. Good luck!

 

Are you sure the startup smoke isn't a light bluish color?

 

im now positive its (edit) white. i took it for a spintoday its white which means its lean. um by the way its mechanical

 

lol. well then. your running rich. check your choke it could be stuck. or something with the carb isnt' working right. myn runs rich because it defulted to that setting. do to i broke some computer thing. make sure all the connections are hooked up. this is a q-jet carb right. computer controlled?? a lil more info would be nice thanks

 

smoke is white i took a look yesterday but it was in the shade and looked black, but now driving it on the street today i looked in my rear and white smoked was pouring out. and its a mechanical qjet rochester

 

so white. make you mind up. like was it alot of white cause if it is you ethier have. a warped head. if it's alluminum. bad head gasket. so stop drivng it do not hydro lock your engien. you bruning coolent and it's really bad. get ti fixed

 

yeah, you've either got a bad head gasket or a warped head... I too would suggest against driving it too much... I would suggest changing your oil though and seeing if you made a milkshake though....

if you have another car to drive around, do it until you can take off your heads and determine the real problem. You'll be able to tell if it's the head gasket pretty quickly (and since you're taking the heads offf anyways you'll need to replace the gasket), to check if the heads are warped, just put it on the ground and look for gaps I guess.

 

If it's smoking white on startup, i'd think it's just condensation burning off in the exhaust. Any water in the oil, or vice-versa?

If it remains white after it's fully warmed up, then there must be a more serious problem. But I think more info is needed...

Blue smoke = oil
White = water
Black = fuel

I know that much at least.

 

hey curtis, is the vacuum tubing removed from your exhuast system?