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Where is the servo vacuum pipe located? - 2000 Nissan Sentra

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Comes off the inlet manifold(petrol models) and runs to the brake servo booster

Posted on Apr 25, 2010


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While driving hit resume cruise control and the car speed up to 100 and brakes would not work. Had to shut engine off in middle of freeway, what could it be?

Could be a faulty cruise control servo activator. The power to move the cruise control Actuator is most likely coming from the Brake power hydraulic booster vacuum pipe and if the cruise control vacuum servo is failing and leaking in air you lose the brakes power hydraulics.
check the vacuum pipe coming off the power booster brake master cylinder vacuum pipe you may find a tee connector in the vacuum main pipe and follow it to see where it goes to. Could be a break in the cruise control vacuum hose but if it is only happening when the cruise control is activated a fault or leak in the cruise control servo device is the main suspect. Which you should find at the other end of the cruise control vacuum hose.

Jan 31, 2016 | 2004 Oldsmobile Alero

1 Answer

Jaguar xj8 running rough

you have a air leak check the vacuum pipe going to the brake servo/booster from the induction housing below the throttle body if not it could be the servo/booster i think the pipe is a black plastic pipe and can fracture

Apr 10, 2013 | Jaguar XJ8 Cars & Trucks

2 Answers

Where can I locate the crank sensor on a grand caravan 3.3 lt 2001 sport

Remove battery.
Remove the battery tray.
Disconnect the speed control vacuum harness from servo.
Remove the speed control servo and bracket and reposition. Disconnect the electrical connector.
Disconnect the electrical connector from crankshaft sensor.
Remove the mounting bolt.
Remove sensor

Oct 07, 2012 | Cars & Trucks

1 Answer

I have lost my servo assist on my 98 vw 2.4 t4. i removed the pipe into the servo to check for splits, it was fine, so i removed the pipe from the servo pump and oil came out of it, is this correct. Thank...

A small amount of oil may sometimes be evident but if it runs out this will indicate a problem with your vacuum pump. To test the vacuum from your pump remove your pipe from the servo and start the engine,you should be able to feel a strong vacuum by covering the end of the pipe with your thumb. If you get no vacuum and the pipes are intact then the pump is probably u/s . Remove the pump and check the drive is OK .Some pumps can be easily taken apart you will then see just how much oil has gone past the seal,you will also see the veins inside check these for damage.

Jun 20, 2011 | 1993 Volkswagen Eurovan

1 Answer

I have a renault kangoo van, an brake pedal is rock solid which effects braking does anyone know the known causes

hi from uk this sounds like you have no servo assistance with brakes? if your engine is diesel? then the vacuum pump is not providing assistance there are different methods of haw vac pump is driven? some are driven off rear of alternator/ off the rear of camshaft ? if petrol engine ? the vac is a pipe from inlet manifold connected to servo unit this pipe has also a none return valve fitted may i suggest whether diesel or petrol engine you check the hoses from pump to the servo ? also if alternator driven pump? check fanbelt? if ok then to check if pump is fault? pull out the hose /pipe from the grommet entry point on servo unit and with engine running ? you should feel vacuum if you put finger over the end ? no vac ?? you will have to check the drive coupling from alternator if diesel engine ? if you come back with more info after tests above ? may be able to advise further?

Mar 15, 2010 | Renault Le Car Cars & Trucks

1 Answer

Vw t4 1995 2.4 diesel brake problem, brakes no feel,changed servo

To check the vacum pump.all you have to do is remove the pipe from the servo,and with the engine running that pipe should be finger over the pipe and check.If its not sucking then check the pipe for cracks.If the pipe is ok then replace the pump

Nov 09, 2009 | 1993 Volkswagen Eurovan

1 Answer

Liitle break

It is a round cylinder that is bolted to the firewall/bulkhead and the brake master cylinder is mounted on it. The servo has a largish vacuum pipe going to it from the inlet manifold on the engine.

Apr 12, 2009 | 1995 Ford Contour

1 Answer

I get a high pitched whine from the back of the brake servo when I release the foot brake, is it a vacuum/air leak and can it be fixed with the servo in place.

Sounds like the servo is shot !

Clamp off the vacuum pipe,to the servo with a brake hose clamp, and if noise disappears, you need a new servo unit.

A FixYa would be nice, Thank´s.....

Good Luck !


Mar 07, 2009 | 2002 Volvo V70

1 Answer

Hard clutch pedal

You cannot bleed a servo. it runs using the vacuum from either inlet manifold, or a seperate vac pump.Ensure pump is working if fitted (end of camshaft) the pipes to the servo are not leaking by removing the pipe from servo and start veh. If there is good suction then its servo failure. hard pedals can also be caused by pressure plate fatigue in the clutch itself.

Dec 30, 2008 | 2002 Land Rover Freelander

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