[SSLance]

Thanks David, you always bring great tech to any thread...

I love how people take what this box gives them and then try to figure out ways to trick it do even more than MSD suggests with them. All great ideas...

I wonder why my vacuum gauge and MAP sensor via the MSD screen vary so much from your cheat sheet? Mine very clearly shows 20" of vacuum corresponding with 7.00 PSI.

I currently have the vacuum gauge hooked to a timed port on the top front of the carb (same as goes to the choke pulloff) and the MAP sensor hooked to a manifold vacuum port at the back of the carb base next to the brake booster port. I guess I should rearrange one of both of them to really see what is going on... Where should I put each connection for the best info gathering source? This is a 1977 mechanical quadrajet with an electric choke.

I also noticed the other day that my heater controls aren't working properly so I'm going to cap those vacuum ports off for now as well as I might have a vacuum leak there that could be affecting things.