Depending on what year you have, mine is a 92. The flow should be continuos. From the resovoir to the pump, through the pump to the steering box, from the steering box up to the vacuum booster, through the booster then return to the resovoir. There is also one more line that I would assume that under idle would be a bypass line to constantly provide fluid.
I have replaced the vacuum booster with a junk yard one ($220.00) 3 month warranty. I am repl;acing the pump on Sat morn. My Vac booster and pump both failed at the same time. Very starnge and a very stupid system.
Over the last week I have also noticed that the steering box is not being lubed properly. (Dry scraping noise while turning)
Once the parts are in you must start your van and run it till warm. Jack the front wheels off the ground and then start turning them side to side 100% each way about 20 or so times. This will bleed out any air in the system.
Let me know what you find out and I will do the same on Sat when the pump is installed.
Saturday, January 27th, 2007 AT 2:06 AM