Question about 2001 Ford F150 Styleside SuperCrew
Sounds like your front hubs are staying engaged, lots of problems with them on Fords, there should be a vacumm solenoid next to the battery, follow the lines down to the wheels and check for leaks. If you have a vacuum guage you can plug the line at 1 wheel and connect the guage to the other when the 4wd switch is placed from 2wd to 4wd h there should be a vacuum signal there i believe its like 12 to 15 hg and when you go back to 2wd its like 6 hg on the guage. If that dont work suspect the solenoid they are prone to water intrusion. if the vacuum signals are correct suspect on of the hubs has a vacuum leak, you need a hand held vacuum pump to test them, connect it to the vacuum port and pull a vacuum it should hold 15 hg for at least a minute, i think the actual bleed down rate is 5 hg per minute per Ford. If the hubs are leaking its a bit of work but not impossible, much cheaper to do yourself than at a shop.
Posted on Jun 19, 2009
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Posted on Jan 02, 2017
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