I've got a 67 327 275 Hp. Used to run great after a rebuild on the quad jet. A few weeks ago it started to die or drop out for a second before picking up when I would push the gas. I checked timing which was about 8B and vac was around 15 at idle.
After that everything just went to the crapper. Can't even drive it now. Just dies and sometimes backfires. I can't get more than 10 on the vac gauge now at idle and really turning the screws does not make that much difference until I turn them far enough that the car dies. The timing is the same as before but I am hearing a decently loud valve tap from the motor. I can rev the motor while in P or N but once it's under load it's over. Exhaust even sound different now. Wondering if there is a way to tell if I lost a valve by just taking the valve cover off. I'm an OK backyard mechanic but not sure how to check the valves and how much play they should have.
Any help would be great.
Thanks
After that everything just went to the crapper. Can't even drive it now. Just dies and sometimes backfires. I can't get more than 10 on the vac gauge now at idle and really turning the screws does not make that much difference until I turn them far enough that the car dies. The timing is the same as before but I am hearing a decently loud valve tap from the motor. I can rev the motor while in P or N but once it's under load it's over. Exhaust even sound different now. Wondering if there is a way to tell if I lost a valve by just taking the valve cover off. I'm an OK backyard mechanic but not sure how to check the valves and how much play they should have.
Any help would be great.
Thanks