- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
in the USA? 4.0L engine. TRANSMISSION VAC>. 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 but is this and engine swap, and missing this?
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!) and ported vacuum, weak or no vacuum at all at idle.
easy huh?, just use the hard vacuum line,, or make one.
Thinking this third hose is the actual vacuum hose that goes to the T near the vacuum reservoir located in the drivers side fender just below the antilock brake assembly. There is a one way valve in the line from the transmission to the T.
it is located on the side of the transmission case, it has a vacuum hose going to it, make sure that hose is good and has vacuum from the engine going to the modulator, here is a picture of the modulator so u can ID it.
Depending on your carb, distributor and transmission, you have from zero to two vacuum hoses.
If you have an Autostick transmission, there's a vacuum hose running from a port in the intake manifold to the control valve on the left side wall of the engine bay. (Hint: if you've got a car that came with Autostick and that someone's converted to manual transmission, the bracket for the control valve is the perfect place for your coil.) Most people don't have this transmission even if their car came with it--it's only a three-speed and it's hard to find parts for it, so most of those cars have been converted to manual transmission.
The other hose you might have is for your distributor. The port is on the left side of the carb, and a hose runs between it and the metal vacuum advance can on the side of the distributor. If you have a 009 distributor or an aftermarket distributor like an MSD you don't have the vacuum advance can; if you have an aftermarket carb like a Weber you don't have the port. Therefore...you probably don't have any vacuum lines on your engine.
if only one vacuum line then?
the vacuum line goes from the vacuum advance on the side of the dizzy, to the carburettor, just around the throttle linkage if i recall. hope this helps.