ok so i recently realized that the clip that holds the vacuum advance plate down was very weak, so i went and got it replace, now it runs great, but i was having a lot of problems with it before, like burning oil...A LOT, carbon build up on the plugs, and spitting and sputtering when i would go to accelerate. my question is could my variances in vacuum advance be the cause of my carbon build up on my plugs and the lots of burnt up oil(almost a quart every 2 days...about)
I think we need to look at some other things for the oil consumption. The ignition advance will have a big effect on engine performance but should not cause an egine to start or stop using oil. Do you see exhaust smoke? If so under what conditions? How about leaks as well? Burning oil will cause alot of carbon buildup. Do you have alot of crankcase pressure(blowby)? An indication of this may be oil in the air cleaner housing if your motor has a hose that runs from the valve cover to a little filter in the air cleaner. Dave
it smokes upon hard acceleration, my mechanic told me it could be the valve seats. no oil leaks that i could tell, but i'm gonna check again soon. yes there is an smaller air filter inside the filter housing, and i havent replaced that yet, but i have cleaned it...and it gets dirty very very fast.
Smoke upon hard acceleration indicates valve stem seals. The crankcase breather filter (the little one inside the air cleaner housing), if it is getting dirty (oily) very fast indicates blow by, your rings/cylinders are most likely worn and compression and oil will leak by the rings, compression that is leaking by pressurizes the crankcase and blows oil up to the crankcase breather. This occurs on the compression stroke, on the intake stroke you are most likely drawing oil into the combustion chamber past the rings and burning it - oil loss and carbon build up mentioned earlier.
