Durango 4WD V8-5.9L VIN Z (1998)
Vacuum Circuits
3. Determine the vacuum line color of the vacuum circuit that is leaking. To determine the vacuum line colors, see the Vacuum Circuits chart.
4. Disconnect and plug the vacuum line from the component (fitting, actuator, valve, switch, or reservoir) on the other end of the leaking circuit.
Instrument panel disassembly or removal may be necessary to gain access to some components. See the Replacement for more information.
5. Connect the test set hose or probe to the open end of the leaking circuit. The test set gauge should return to the 27 kPa (8 in. Hg.) setting shortly
after each connection is made. If OK, replace the faulty disconnected component. If not OK, go to Step 7.
6. To locate a leak in a vacuum line, leave one end of the line plugged and connect the test set hose or probe to the other end of the line. Run your
fingers slowly along the line while watching the test set gauge. The vacuum reading will fluctuate when your fingers contact the source of the leak.
To repair the vacuum line, cut out the leaking section of the line. Then, insert the loose ends of the line into a suitable length of 3 millimeter
(0.125 inch) inside diameter rubber hose.
