Vacuum tree near MAF?

[porshapower]

Does anyone have a diagram of the vacuum routing for the little vaccum tree near the MAF. I found my vacuum leaks and and the tree has 7 connections (3 on each side) and 1 in the front which goes to the throttle body. I am missing 2 for the sides...this is maybe my high idle issue. Anyone ever route these individually with regular vacuum rubber hose? My car is a 86.5 automatic. Thanks

[Mrmerlin]

OK the main feed goes to the rear of the throttle body on the driverside.
then the other 6
1 auto trans modulator
2 fuel pressure regulator on the RR fuel rail
3 EZK in the passenger footwell
4 LR fuel rail to the damper
5 LF fuel rail to the front damper
6 switching valve on the cross brace

[Danglerb]

regular rubber hose can collapse when vacuum is high so no air flows through it. Hard line vacuum tubing or "real" vacuum rated hose are the only things I use.

[porshapower]

Hello Thank You for the responses guys. I will stick with the hard line. As far as when you listed the locations by number, is this a sequence or can you plug the 6 side brances anywhere. Or if Im standing in front of the car did you list them from left to right starting at the top of the tree??? Thanks again....what a nightmare getting to this tree..yikes

[Mrmerlin]

the order was what I could remember fit the lines where they will have the least bending, use some long needle nose pliers to slide the hard lines into the T

Just make sure the rear side of the TB housing has 2 vacuum line connections the one for the T line is the upper one and it is closest to the driver side for a USA car

[porshapower]

Thank You for the help The long needle nost pliers is a good idea...never even thought of that I ordered a new tree today and went ahead and ordered all the new round intake rubber boots because mine were beat up. Any trick to the throttle body. Seems like mine is loose...I removed the round intake tube above it with the round rubber boot that slides over the the throttle body. When I touch the throttle body it is loose...what fastens it down? Good time to clean the throttle body too Thanks again!! Nel

[Mrmerlin]

IIRC the TB is held by the rubber boots and they both have screw clamps, its possible one is loose.

Note when fitting all of the pieces back together be aware of fitting the screw clamps so they can be reached easily from the outside of the intake if possible.
You may have to go buy a longer screwdriver or a longer 1/4in drive with a 6 or 7 mm socket to tighten the clamps, dont over tighten though just past snug is tight

[porshapower]

Thanks again When you say the tb is held by the rubber boots,do you mean the rubber boot that came off the bottom of the one intake runner. I looked around there and saw nothing that appeared to fasten the throttle body to the engine...it kind of just sits there and when all the rubber boots are in place it no longer moves.... Would you say the vaccuum line coming from the top of the transmission is going to the right side of the tree on the top branch or second branch? Thank You Nel

[Danglerb]

The U tube has 3 rubber isolators, each is like a pair of bolts with the heads glued to a 1/4" rubber pad. One threaded end goes in the motor, the other goes through a mounting point on the U and a nut fastens it down. Throttle body mounts to U with an oring and 4 nuts on studs.

[porshapower]

Hello Thanks...I will look to see if the 3 rubber isolators are there....probably not Thanks again Nel

[Danglerb]

928 110 191 00 $7.25 here on Pelican, but hard for me to link to.

http://www.mailordercentral.com/928intl/prodinfo.asp?number=928%20110%20191%2000

[Mrmerlin]

on my 86.5 the auto trans feed is on the left rear of the T fitting

[porshapower]

Thank You so much for the link to the parts...I am ordering new ones next week. I want to do this right and not have to go back in there...Im tires of patching this and patching that Also thanks for the location... for a reference ...lets imagine that this 3E ( I couldnt do an E backwards is the branches of the tree and we are looking over the center of engine do you mean the top branch on the left? Gives me a good starting point....I dont know how this car even ran.. Thanks again guys Nel

[Mrmerlin]

if the T is flat then it would be the left side and the one outlet closest to the rear of the car. but really just hook the lines up so they have the least bending some of the T fittings will bend use a drop alcohol on the hard plastic lines so they will slide into the T fitting easier

[porshapower]

Thanks again I am still waiting on my parts and cant wait to get this car back together and see what else goes wrong lol. When you refer to the left you meant the driver side correct or pass? I tried everything and went to a garage to see if they can pull me up a schematic of what goes where in the tree but had no luck. Thanks for the tip with the alcohol.... I hope they stay in there nice and dont pull out like on the old tree! Thanks again Nel

[Mrmerlin]

with a new T fitting the hard lines will stay put. left is the driver side as viewed when sitting in the seat

[porshapower]

Thanks again for all the help. I was happy to come home today and see the parts were not in Im dreading this job but will get it done. Thanks again and Ill post soon on my progress. Nel