97ss497

iTrader: (24)

Bought a 72 C10 with a 2007 4.8 van engine. The intake manifold has a port on the passenger side that is sucking dirty air, if I plug it the engine rpms come down, but it runs fine. Picture shown below, it's in the center of the pic. Can someone clue me in as to what it was used for? Thanks

Project GatTagO

iTrader: (7)

That's called a vacuum leak. Plug the hole.

Andrew

97ss497

iTrader: (24)

I realize that Andrew but was wondering what it was actually hooked up to when it was originally in the van.