WJ 4.0 Vacuum Leak
I've got a vacuum leak on my '99 WJ 4.0. I know where the leak is. It is one of the hose bibs coming off the driver side of the intake manifold. It had a solid cap over it. The problem is when I put the cap back on it the engine dies. If I leave it off, it will idle fine. If I take off the cruise control vacuum line off and have the other spot open, it will idle at 1,000 RPM.
Anyone got any idea?
1999 Jeep Grand Cherokee Limited