Help with idle problems 548..
I resently bought a 548 BBC with a BG 1150 alcohol carb, the engine sounds great and is real responsive. I was told the car ran a 5.05 last time out. But after you blip the gas the engine is slow to come back to 1200 rpm idle. It seems to hoover around 1800 rpm for a few seconds before it goes back down to idle. I tried a alcohol Davinci carb and it did the same thing. I then noticed when I was checking timing , that the distributor advance wasn't locked down. Ive always ran all my distributors locked. Could this cause this?