2.5L & 4.0L Only
- Disconnect transducer vacuum lines and (if applicable) backpressure line. Remove transducer.
- Plug transducer output port and apply 1-2 psi of regulated compressed air pressure to transducer backpressure port. See Figure . Apply a minimum of 12 in. Hg to transducer input port. Vacuum should hold. If not, replace vacuum transducer.