Question about 1993 Toyota Land Cruiser

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Vacuum pump hoses

I have a 1993 land cruise diesel and the small hose coming out of the vacuum pump has dislodged from its connection point. it is still connected to the outside of the vacuum pump. where does it connect to

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If the hose is about 1/2 inch and about afoot long and has oil inside of it probably is an oil return line back to the sump. If it is clean inside it will go to a item requiring vacuum like a governor or a brake booster.

Posted on Mar 19, 2014

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Posted on Jan 02, 2017

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SOURCE: Vacuum hose diagram needed

Thers only 2 hoses and they only go one way?

Posted on Dec 30, 2009

emissionwiz
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SOURCE: I need a vacuum hose diagram for a 2001 toyota camry cruise control system

I am sorry but fixya has no diagrams of the system. The diagrams are part of the factory repair manuals and that is copyrighted by the manufacturer. You can pay for access and download the info at this site. I have no affiliation with the site just passing on the information to assist you. www.alldatadiy.com

Posted on Jul 13, 2012

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The pump is located on the passenger side of the engine compartment, back by the firewall. Look in the middle of the firewall by the cowl and you'll see a small plastic line going into the cowl. follow it back and you will come to a T fitting. Follow it to the passenger side and it will go into the Vacuum pump that controls the Cruise control.If you follow it to the other side, it goes under the Battery box. this is where the Servo for the cruise is located. Check the lines for small cracks, wear spots or even breaks. The plastic line can get beaten up pretty easily.
The easy way to see if it is your vacuum pump, turn the key on and listen. you will hear 2 distinct sounds. The first sound will stop in about 15 - 20 seconds. (fuel pump?) the second sound is the vacuum pump. If it turns off in 45 seconds to a minute (or slightly longer) the vacuum pump is probably ok, as are the plastic lines. The sound of the pump stopping means that vacuum has been achieved and is holding vacuum. If it keeps running, the pump is bad or the lines have a break in them. If the lines have had a hole in them for a long time, the diaphragm in the pump will have gone south. This is not a servicable part and the pump will have to be replaced. The pump is available from a dodge dealer but most likely the parts guy will not have a clue as there is no picture in their manual and a very poor description. When talking to them ask for a "03 Ram 2500 CUMMINS Cruise vacuum pump"
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It runs the cruise control, the heater controls usaully, and possibly something else. I would be looking for a leak in the resevoir, or a vacuum line.

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If the cruise control switch seems to work then the problem is in this area and is a little odd I know.

First thing is to check the hoses and cables on vacuum pump throttle control. Yes I know that sounds odd but there's a vacuum pump that is used to give the smooth accelleration feeling with cruize control. Crazy mitsu engineers.
Open the hood. On the far right there's a metal squarish box with a hard metal thin pipes comming out of it with one guiding the throttle cable to the throttle on the back of the engine. Another to a vacuum solenoid with a cable and a hose attached. It's a round can somwhere behind the engine on the firewall. Remove the control box and make sure there's a small right angle hose on the bottom that connects to the vacuum pump. unfortunately there's no easy test for the system as you have to be moving over 25mph to use cruise but i would start with the areas I've outlined and look for leaks or stuck cables.

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