1999 Ford Ranger PVH vacuum loss

  • 1999 FORD F-150

1999 ranger, 150 000 kms. I have had problems with the PVH hubs disengaging. Its been a long process but Ive narrowed it down to a vacuum loss to the hubs. I have steady vacuum supply to the solenoid thingy under the wheelwell and when I take the vacuum line off from the output of the solenoid thingy I have steady vacuum for about 15 seconds then. Nothing. My question is. What tells the solenoid thingy to pulse. Is there a module somewhere. I know the PVH hubs are not the greatest but mine work great when they are engaged. They are just losing vacuum. And disengaging. PLEASE HELP. If this is answered quickly I willl definitely donate :)

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have the same problem?
Tuesday, January 9th, 2007 AT 10:37 AM

1 Reply

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Not to say this is your silver bullet, but 3 times I had the same problem. The metal vacuum tubes at the wheels corrode. Pull off the rubber vacuum tube from the metal one, clean it, and very lightly put a touch of silicone gasket maker thinly around the tube keeping at least 1/4" from the end of the metal tube and re-insert the rubber tube back on. Then try it.

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Tuesday, January 9th, 2007 AT 6:28 PM

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