The Stovebolt Site Forums The Shop Area Engine Shop 2nd vacuum advance unit fail in 16K miles,,,,

Jerry, yeah I notice that but thought it was more to keep the mixture richer inorder to keep the engine from hesitating/stumbling until it warmed up.

Wrench, you may be right. My 72 ACVW's vacuum advance line has a trap in it to keep fuel from inadvertently making it's way to the dist. I may reproduce it on the 216.

Carl, Either that or the linkage has separated from the diaphram, hummmm....

Roy, that's right no vacuum at idle but there's vacuum at 1k rpm where I let it fast idle to warm up.

These units run anywhere from $35 to $75+ for an NOS.