92_Z71
Newbie
My '92 Z71 engine idles rough. It surges and sometimes it cuts off. The previous owner never changed the plugs or oil before I got it. He let it set for a couple of years without starting it. When I got it I changed the plugs, wires, and oil. But it still idles rough. The engine is stock and has 204xxx miles on it. How can I get it to idle smooth?