Probably gonna go there. Seems crazy to me that nobody makes a cheap PCV valve that has a small spring in it for low vacuum cams. Would think that would be a good selling item. Trying to preserve a stock look.
One thing I did do is change the springs holding the metering rods down at idle, but did not change (or measure) the metering rods. It may have helped somewhat as they were popping up a bit.
But I think I found the larger problem. I noticed that when I clamped off the breather hose that goes to...
Carter AVS Idle issues
Sorry about the long post but didn’t want to waste anyone’s time suggesting things I already tried. 1970 Challenger RT 440 4 barrel with Auto and AC. LA built CA car with ECS. Using Carter AVS 4740S. EBay carb from years ago and had it rebuilt but would never idled...