Question about 1988 Jeep Comanche

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Looking for diagram for vacuum hoses/1988 jeep comanche pick-up 6 cy. They were disconnected & now we are unable to re-hook them back up in the proper way they are supposed to be. The engine is making a whistling sound & there are places that the hose is supposed to go but we don't have any hose left over for them. The engine run perfect prior to having the lines disconnected.

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    yadayada May 11, 2010

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The best bet would be get yourself a chilton manual and hope that helps you out

Posted on Jun 06, 2009


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Need to see diagram for 88 jeep Cherokee Laredo straight 6 for vacuum line for transmission

in the USA? 4.0L engine.
So that be automatic.
and some have a vacuum modulator.
some dont.
if it does, its just a vacuum line from the modulator to the plenum.
the modulator uses hard vacuum to sense engine load, to delay shifting/

some EPA hood stickers fail to show this hose.
because its a trans hose and not related to smog.
only this is covered in the FSM.
surely you can find the empty nipple in the plenum
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I owned 3 1988 2 JX and 1 Comanche.

id find a vaccum line under full vacuum under idle. 20inches is typcal. (cant find real nipple?)
then add TEE fitting to this line and to trans.
end story.

there are 2 kinds of vacuum./
vsv solenoid switched, (like that on EGR)
direct plenum vacuum (bingo!)
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easy huh?, just use the hard vacuum line,, or make one.

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