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Jason94sport

Explorer Addict
Joined
April 30, 2001
Messages
4,179
Reaction score
87
City, State
FL
Year, Model & Trim Level
02 Sport 2WD 5 speed
That's your vacuum tree. Either a hose is loose fell off, or 1 fitting is supposed to be caped & the cap fell off. The hiss your hearing is a vacuum leak.
 






agobbie

Member
Joined
January 29, 2007
Messages
31
Reaction score
0
City, State
phoenix, az
Year, Model & Trim Level
93 XLT
I cant find any hoses loose any where, is it possible that there are 2 fittings to be capped ???
 






CDW6212R

Hauls the mail.
Elite Explorer
Joined
June 17, 2004
Messages
23,450
Reaction score
3,929
City, State
Knoxville, TN
Year, Model & Trim Level
98 Limited AWD
That picture looked like a vacuum cap with a hole in it, I'd have to look under my 91 XLT hood to see. I know that my 93 would almost always blow off a cap there if it ever backfired. That was rare to happen, but when it did I always stopped and checked those caps on that vacuum junction block. Good luck,
 






walterd140

Well-Known Member
Joined
August 9, 2003
Messages
355
Reaction score
1
City, State
Ludlow, Massachusetts
Year, Model & Trim Level
'94 Sport
If it's hissing & not a snake, then the best way to find the leak (in my opinion) is to get a can of spray start or in a pinch a spray bottle of water. Spray the hiss area & see what area dries the quickest. Vacuum will draw outside air in & dry leak faster then no leak. Little bit of water won't kill your vacuum system, just when you submerge the truck in a lake :)

Walter
 






93explorer4life

Well-Known Member
Joined
April 25, 2006
Messages
514
Reaction score
0
City, State
Bloomfield, Indiana
Year, Model & Trim Level
no curent
you got a blown nipple, same thing happend to my 93, got a hiss, couldnt find it, took it to my budd, and he said....look. no nipple got me one from garage, and there you go, all good,! im 99.9 % sure thats waht it is!
just get you a nipple from an auto store, or if you have a spare laying around!
looked like it had a hole in that first lill nipple thinger!
 






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