Vacuum advance hose

[fixkick]

im digging deeper
found some books, in attic....

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got the whole 89 parts list
that is a 89/90 intake main pipe on top, id need photo with it off, to see
if you have design #1 89 or design #2 89
so posted design 1 above that hose on top goes to the valve cover pipe
now design 2

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as you can see they changed part 22 (25 in my first post ,now updated with all numbers)
so part 22 LEFT hose goes to front of main air pipe (nipple on main pipe from called fresh air)
and hose at 22 right, goes to the valve cover, sucking blowby gasses from top of engine.

i think 22 likes to rot out and get lost.
where as the T shaped, fitting made of metal lasts forever.

not seeing TB with that pipe off, one can never guess. what design you had./have.

part 25 is a big clue here,,,

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next , the main pipe. 89/90 listed. only one. 91 changed radially.
see that nipple on the main pipe, left in photo that is the other PCV hose.

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22 is gone right?
but in one of your photos , i see a hose there,
but with the main pipe installed, it be impossible for anyone to ID it as design A or B.
pull the pipe. and bingo

those 2 hoses on top can only go 2 places
main pipe, and valve cover. there is no where else to go.

has no water hoses for ISC, (its not heated so , no hoses large like this)
nor air hoses for ISC (there cast in the TB)
only water hose for IAC port.
the reset are tiny vacuum hoses or the large brake booster hoses.
leaving just 2 PCV hoses. to deal with'.
that is my full report on hoses.
small /medium.