The car has a semi-mild 454 with 9:1 comp. and the cam= .228/.228 @ .050. The motor normaly runs great and has a smooth idle. The 67 Chevelle is stripped and is used for only racing. I let the car sit for 2 months and last week I pulled it out and cleaned up the holley 850 carb. My problem is that now it is running WAY TOO rich and the motor lopes like it has a full race cam in it. At idle it just pours out black smoke from the header. I have looked into the carb and I can't see any gas dropping. i just don't know where all the fuel is coming from. I tried to race it friday but it was just too much black smoke. It actually launched good but then fell on its face. I changed the power valve once but nothing changed. I was told to find the lopeing problem because maybe I didn't have enough vacuum to close the power valve. If you guys have any ideas I would really appreciate the help.
Thanks ahead of time.
Will / N.B. Tx.
Thanks ahead of time.
Will / N.B. Tx.