1988 gulf stream 460 Ford motor vacuum lines

You may find that some of the vacuum-powered anti-smog devices have been removed, leaving the lines in place but not connected. We had an '85 Class C with that engine - what a disaster!

Since we don't have a requirement for smog testing every year, I unhooked quite a few of them to get the engine running better. We still only got about 6 mpg and that dropped to about 4.5 at altitude. Many of our trips were over the Cascades into Eastern WA and even with $2 gas, trips were expensive.

Look on the engine, air cleaner cover and all around for a sticker that has a diagram of the vacuum lines. If that fails, go to a local auto store and get a Haynes or Chilton's manual for a 1988 or so ford truck. You could also try contacting a ford dealer, maybe they could email you a diagram. Good luck with your repairs.

Miles