Originally Posted by ER12883
Yes. You are trying to set initial timing. The distributor uses the vac signal to advance the timing when you hit the gas. This screws up your reading. You probably have to plug the hole so you will still be able to idle with the hose off.
Thanks, there are 2 vacuum connections on the distributor , the hose that is connected now is on the connection nearest the radiator, the other connection is open. Does that sound correct? What's the other connection for ? Retardation of the timing?
Sent from my iPad using Mustang Evolution