I have a 70 Chevelle 350/350 that I seldom drive. Just wondering what the black residue coming from the tail pipes are. Could it be build up from not driving it on a regular basis? Thanks, from the novice!!!

YOU PROBABLY HAVE A COMBINATION OF TWO THINGS 1 GENERALLY ANYTIME YOU HAVE A RICH FUEL MIXTURE SUCH AS A STUCK CHOKE OR NEEDLE AND SEAT LEAKING YOU GET A BLACK RESIDUE AS WELL AS BLACK SMOKE 2 IF YOUR CAR SITS FOR LONG PERIODS OF TIME AND YOU START IT UP AND ONLY LET IT RUN FOR A LITTLE WHILE YOU TEND TO BUILD CONDENSATION IN YOUR EXHAUST SYSTEM THAT DOES NOT COMPLETLY EVAPORATE BECAUSE YOU DONT LET IT GET WARM ENOUGH. I WOULD THINK YOU MIGHT HAVE A COMBINATION OF BOTH.
TAKE THE OLE GAL FOR A LONG HIGHWAY RIDE AND SEE IF IT DOESENT CLEAR UP, IF IT DOESENT I WOULD LOOK AT MY CARBURETOR. HOPE THIS HELPS, AND ONE THING YOU WILL FIND ON THIS SIGHT IS A LOT OF PEOPLE HAVE DIFFERENT IDEAS AND IT IS A GREAT HELP ALSO DON'T WORRY ABOUT BEING A NOVICE BECAUSE WE ALL WERE AT ONE TIME

JEFF PALAZZOLO
1966 ELCAMINO
ST. LOUIS MO

Jeff, Why are you yelling???? (all caps)