1977 c20 with a newer Gm good wrench 350 with about 13,000 miles and a Rochester quadrajet. Everything stock except for electric fans. I bought it last summer, stored it for the winter and pulled it out 2 weeks ago.
I have a new problem I didn’t have last year. After getting up to temp it wants to stall when idling. It never stumbles when I’m pressing the gas. I used stabil to store it, I siphoned some gas when I pulled it out of storage and it looks and smells normal. Initially I thought it was a power issue so I replaced the battery and alternator. I also replaced spark plugs and wires. The plugs look fouled with dry black soot. Timing was set at 8, I advanced it to 13. I’ve tried tuning the carb but that didn’t fix the problem either.
I even tried seafoam in the gas but nothing has worked so far. Any ideas?