The low pressure valve on the 01 expedition is located on the accumulator on the passenger side fire wall. The accumulator is underneath the battery relay and a grouping of wires. Had to squeeze hand underneath a heater hose and an a/c line to remove cap and hook up hose. Nothing has to be removed to locate the valve just a little touchy feely. Valve faces a 45 forward toward the engine.
The placement of this low pressure port in such a hidden position, and placing the high pressure port in full view and easy access would be a safety issue if the ports were not "size" protected. However, that doesn't excuse the fact that whoever at Ford engineered (if you can call it engineering) this fiasco should be strung up by the heels with his hair touching the top of a fire anthill, on a hot day, and the ants agitated every now and then! I have seen such stupidity before among automotive junior design engineers but this ranks with those of micro-cephalic makeup! Automotive junior engineers should be forced into a 15 year apprenticeship of working on the stupid errors of their predecessors located in the middle of the Sahara desert with a class time of 10am to 6pm without breaks or a water bottle! Of course, the Triton engine isn't any easier to work on even if it does perform fairly well. What a bunch of boobs these Ford designers of the early 2000's must have been (and maybe still are, but I don't have any later model Fords to evaluate!
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It should be on pass side at rear of engine compartment
ThxsFor the advise , after 10 minutes I had to get a flashlight I finally found it under battery relay at firewall just like the guys here had said, thxs guys .its there it was tuff to get hose to lock in there to the nipple
Im Sure I leaked half of it. But said it measured 45 psi. Works awesome only needed one bottle.
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