Small vacuum leak showed up on auto parts machine. need a vacuum diagram. best way to locate the leak. we tried with a special doctors hearing device but did not hear nothing

On my Trooper, I know its not a Toy, but the gear changes and more importantly the overdrive operation is controlled by a speed sensor on the tail end of the gearbox usually where the speedo cable is. A fault with this may cause all your problems. Try and locate the speed sensor from a handbook or call to a Toy specialist.

VACUUM LINE DIAGRAMS

There are few direct links showing exact vacuum line diagrams. I suggest you to refer the direct links.

Click the link below: -----

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How to locate the vacuum leak?

http://howtobyme.blogspot.in/2012/01/how-to-locate-vacuum-leak.html

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Vacuum Hose Routing Diagram For 1995 Chevrolet Corvette Throttle Body?

http://schematicsdiagram.blogspot.com/2011/12/vacuum-hose-routing-diagram-for-1995.html

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VACUUM DIAGRAMS For Audi A4?

http://repairhelpcenter.blogspot.com/2011/11/vacuum-diagrams-for-audi-a4.html

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VACUUM DIAGRAMS For VW Passat?

http://vwrepairhelp.blogspot.com/2011/11/vacuum-diagrams-for-vw-passt.html

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Vacuum line diagram For 1996 Chevrolet Lumina?

http://schematicsdiagram.blogspot.com/2011/12/vacuum-line-diagram-for-1996-chevrolet.html

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Vacuum Hose Routing Diagram For 1995 Chevrolet Corvette Throttle Body?

http://schematicsdiagram.blogspot.com/2011/12/vacuum-hose-routing-diagram-for-1995.html

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Vacuum diagram for Isuzu?

http://technoanswers.blogspot.com/2012/01/vacuum-diagram-for-isuzu.html

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Ford 4 wheel drive vacuum solenoid working system?

http://technoanswers.blogspot.in/2012/02/ford-4-wheel-drive-vacuum-solenoid.html

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These will help.

Thanks.

Just go to any Ford dealer parts dept and they can show you diagrams of all the parts in the engine vacuum system. They will be the only ones that will have this part so you have to go there anyway.

This is a different problem than a normal Vacuum leak. The Evaporator emissions lines have both fuel vapors and vacuum flowing through them. If the leak is in the hose system, the method used to find the hole is called a "smoke test". This requires a special machine which pumps a visible smoke into the Evaporator hoses.

Leaks as small as a pin hole can be found and patched. The gascap is also a part of the system and a bad cap can cause a leak too. The gascap is about the only thing you can try before a smoke test. You could also have a bad gastank which could also vent Vacuum from the system. Smoke would also escape from the tank to reveal a leak during the smoke test.

I hope my solution is helpful.

I found the best wiring and vacuum line diagrams in the Chilton's manual I bought for my truck call your auto parts stores to see if they have one not all auto parts stores have Chilton manuals these manuals have diagrams for most all systems in your car or trucks

Your best bet is to get the hose assembly from the Auto parts store. Those are high pressure hoses made of special material that are resistant to the corrosive nature of Hydraulic fluid and the pressure that builds in those lines. The connections where the hoses connect to metal connectors are compression fittings and difficult to replace under the best of circumstances. When you identify the parts you need Auto Zone and Advance Auto can show you the parts diagram so you can make sure you get the correct line.

hi, dear friend, this is an obd2 trouble code table. it can help you understand the meaning of code.
The best way to fix a P1456 error (small evap. leak) on your Nissan is to have a "smoke machine" test done on it. This machine is hooked up to your car and pushes smoke throught the evap. system. The smoke will shoot out of the leak and indicate its precise location. You can also try getting a new gas cap and make sure that it clicks 3 times when you close it after filling your tank. Also, NEVER leave your car running when your fueling up as this can cause your "service engine soon" light to come on. The best choice however is doing the smoke test as this will elimiate any guess as to the location of the leak. Nissan dealers can perform this smoke machine test for you for about $90.00 and can save you alot of money by pin-pointing the leak so you don't keep buying parts you don't need.

There are leak detector cans of R-134A and leak sealers available at the auto parts store. If you know the compressor is working but it's not kicking on or staying on, I'd try the leak detector first. It has a dye in it that will show any leaks in the sytem. Hope this answers your question. Best of luck.
Greg

A P0171 code does not indicate a vacuum leak; it indicates a dirty mass air flow sensor. This device is located between the air filter box and the intake manifold. Locate it, unplug the wire harness, and remove the 2 screws that holds it onto the intake pipe. Look down inside th sensor, you will see 2 small wires, that are probably covered with fuzzy things...using a spray cleaner, such as brake cleaner, spray the 2 wires until they are clean and shiny. Do NOT use compressed air, that will damage the sensor. When it is clean; reinstall it and drive it. The computer will recognize the now clean sensor, and your troubles will be over.

The rubber vacuum hose comes off the intake manifold inside the engine compartment.
The vacuum lines are located on left side fender, under the hood.
If you look facing motor you will see tehm on the right side.