Question about 1995 Pontiac Bonneville

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Vacume line got a hose which is bigger than the other vac. lines and looks to be coming off the power brake booster.does this go to the throttle body as there is a open end where a hose of some sort should go? there is also a small round filter next to the open line.does this line require some sort of in line filter or regulater?

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This is the power brake booster vacuum line, the little round thing is a vapor separator to keep gas from entering the brake booster and destroying the rubber diaphragm, the line goes to the intake manifold near the rear of the manifold, the length of the vacuum line is a good guide to where it hooks up, if you run the engine you will hear a very loud vacuum leak to say the least.

Posted on Nov 05, 2008


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2 Answers

How do I change a 1996 Chrysler concorde power steering hose?

STEERING SYSTEM - POWER -1996 Chrysler Concorde LX



WARNING: On models with Supplemental Restraint System (SRS), before any repairs are performed, disconnect and isolate battery ground cable. Failure to do so could result in accidental deployment of the air bag and possible personal injury.

1. Turn front wheels to straight-ahead position. Disconnect and isolate negative battery cable. On 3.5L engine, disconnect throttle cable from throttle body and cable bracket. On all models, remove wiper arms from wiper arm pivots. Remove 6 screws, cowl closure panel and weatherstrip as an assembly. 3. Disconnect air plenum from throttle body, PCV air tube and idle air control motor. Remove air plenum from right side of vehicle. Disconnect wiper module wiring harness. Remove wiper module from cowl panel. Remove power brake booster vacuum hose from intake manifold. Position hose aside. 4. On 3.5L models, disconnect and remove air inlet ducting to throttle bodies. Remove vacuum supply hose from power booster. Remove 2 nuts and remove brake master cylinder from power booster, with hydraulic lines connected, from power brake booster. Carefully position master cylinder against left shock tower. (REMOVE brake master cylinder only if it's in your way) 5. Remove P/S pressure hose and return hose from P/S gear. If equipped with speed proportional steering, disconnect electrical connectors from solenoid control module. Under number 5 above, only remove what you have to get out of your way, in order to remove the line that's leaking. If I remember right, the low pressure line comes off first. You may need to remove that big solenoid control module thing also, if it's in the way. A big crescent wrench I think is what I used on it. Or maybe it was a small crescent wrench with a large jaw.... Don't over tighten it when reinstalling. These things don't go in very tight. Neither do the lines. If in doubt, look up the torque spec on them first. The solenoid, I just put in a hair past snug. It didn't leak.

The pump side of the pressure line was a bear to get off of there. I finally cut it off. Then unscrewed part of the pump and the piece of the power steering line that was left hanging out. Put it in a bench vice, and wrenched them loose there. Put it back together with the new NAPA hose, and it works, and hasn't leaked a drop. Good Luck to you.

I know the numbering isn't quite right. That's because I borrowed this writeup from a post regarding power steering rack replacement, and edited it up to fit your situation. If you google the power steering rack replacement, you may find the torque specs for the power steering lines there. But you'll still have to use your arm as the torque wrench....

May 18, 2015 | 1996 Chrysler Concorde

1 Answer

Where do install vacum lines install at on 2000 isuzu rodeo 5 speed transmision

which engine 2.2L or 3.2L?
4wd or 2wd?
2000 Rodeo, no job stated?, was trans removed?, engine pulled?
what makes you think the A/t trans uses vacuum? if true.
what lines to what? all vacuum lines to every thing, that it?

what country,? our USA cars , all have EPA vacuum maps under the hood, open engine hood, look up, see that sticker
and yes, some times it skips vacuum lines to brake booster or trans. its only for smog that sticker, so...
but is helplful
what you never said is what engine you have , as that greatly
effects vacuum routing, on all cars. made on earth.

im on line and there is no vacuum map.drawings
it only shows jobs, pulling lines by step, (marking them first)
no words on vacuum for tranny at all. (no vac. modulator now)
all VSV valves
FPR (fuel pump reg)
Throttle body
Electronic Vacuum Sensing Valve (EVSV)

please state number of lines disconnected,
and if both ends disconnected (a horror)
if confused, show photos. of dangling lines

open the FSM book and see each step, for connecting lines
say the booster hose (huge) it says, connect the booster
hose to the large nipple on the Plenum, (its the only one that fits)
Etc. see hose where does it go, it goes to an object.
the object has a name, like VSV for evap so that hose is called
out in the FSM

factory service manual or log in and read, it is there.

Feb 10, 2015 | 2000 Isuzu Rodeo

2 Answers

Vacuum hose diagram

big vacum to brake booster
all the little vacums can be jumped together and they make there way on the throttle body

Nov 09, 2013 | 2003 Saturn VUE

3 Answers

After changing spark plagues ,the breaks became very hard to press....

Check the large vacuum line that goes to the brake booster.. You likely knocked that loose and are getting no boost.

May 12, 2011 | 1996 Plymouth Grand Voyager

1 Answer

Brake pedal hard but all brakes seem like there working maybe vacuum line problem ?

Remove the large vacum line to the power brake booster .start engine and put thumb over the end to check for vacum. should be alot. Also remove plastic check valve and blow on it both ways. should be able to only blow one dirrection.If no vacum on brake line then it is not connected to engine vacum. if all checks good ,bad news ...brake power booster bad ,and only comes with new master cylinder...about 200 bucks and very tough to install..Brake master cylinder probably leaked fluid out the back and broke diaphram inside booster..hope that helps...let me know

Feb 12, 2011 | 1996 Chevrolet Blazer

1 Answer

I need a new brake booster for my 89 LeSabre T Type. I i don't know if I need the entire thing or just the cylinder. I have no pressure with my brakes, even with the brake fluid full. I know i have a leak...

booster rarely go bad and when they do they make a vacuum sound in the car see if vac hose is going to booster from top back of engine 2 booster if that is got vac . but the leak in the brake line is a bigger danger and you cannot diagnose the master or booster with out fixing that leak first &bleading the brakes

Mar 10, 2010 | 1989 Buick LeSabre

1 Answer

My car runs good but has no power ,sounds like a vac problem!

the one thing i use is carburetor cleaner ,spray it at the vacuum lines and the throttle body plate as you do it you will see a change in idle if you spray the bad leak area.but if the leak is that loud it could be coming from the brake booster line or brake booster itself.hope this helps you.

Jan 31, 2010 | 2000 Hyundai Accent

1 Answer

Windstar 2000 no vac at the booster-have great vac at the carb. just have regular brakes , no power brakes. don't believe to have a leak or at least one that I can hear engine runs fine

Check vacum at brake booster if you have vacum there bad brake booster, if you don't follow vacum line check there, vacum line should go to intake, if you do have vacum replace vacum hose.

Dec 13, 2009 | Ford Windstar Cars & Trucks

3 Answers

1989 ford thunderbird standard brake system has hard pedal

I would think the power brake booster has failed, do u hear any hissing when u press the brake pedal?

Jan 16, 2009 | 1989 Ford Thunderbird

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