351W Intake Problem
I started up my '85 Bronco yesterday to a rather loud noise. It mostly sounded like a cracked exhaust manifold but when I tracked down the problem I noticed a hole/port in the intake manifold was not covered anymore. There is a hole just to the driver side of the carb in the intake manifold about 1" dia. (maybe 20-25mm). It is about 1.5" from the edge of the manifold where there are two bolts. I found the remains of some brittle plastic that looked to be the size and shape of a plug that would fit the hole. What's this hole? How can I fix it? Is this a fire hazard or otherwise bad for the truck if I drive it like this? Thanks for your help.