My 72 gmc 5500 was running fine shut it off and now it will not run right at all I checked the oil before I drove it the last tine it was low I drove it about 5 miles the other day it was running terrible and the exhaust smelled like way to rich of gas mixture i checked the oil and it’s now over full and has a gas smell to it . I thought maybe the needle was stuck in the seat but I took the carburetor off and opened it up the needle isn’t stuck at all the bowl moves freely . The fuel pump is the only other place the gas can get into the crankcase right ? I haven’t Checked timing yet but how could timing cause gas in the oil ?
Gm 350 with gm 2g carburetor manual choke .
Last edited by Peggy M; 02/02/202511:18 PM. Reason: add more to title
