Where can i find a diagram of the vacuum lines on 3.0
What is your question?
There are 2 vacuum line ports at the back of the motor one is replaceable and the other is steel stationery. Another is top side to the right of the efi cover
What makes this problem better or worse?
nothing
How long has your 1990 Toyota 4Runner had this problem?
RepairPal Certified shops can diagnose and repair your 1990 Toyota 4Runner. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
http://www.pirate4x4.com/forum/toyota-truck-4runner/61904-vac-diagram-90-3-0-4runner.html