2006 Lincoln Navigator Luxury 8 Cyl 5.40L
my ignition misfires diagnoses says vacuum leak how to fix the problem
Use a handheld vacuum tool (such as a MityVac) to apply a vacuum to the different hoses - to find the leak. Often, simply wiggling / moving the hoses one-at-a-time can cause the crack or leak to come and go - then you have located the problem. Simply replace the specifc vacuum hose.