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Need to check to make sure vacuum lines are in right place

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  • james thurman
    james thurman Jan 14, 2009

    i NEED TO find vacuum diagram that shows where every vacuum line goes ( no one seams to be able to help ,or a web site .All my money spent in parts house and smog shop

  • james thurman
    james thurman Jan 14, 2009

    1983 F250 460

  • Curt Downs May 11, 2010

    year and engine?

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Biggest problem was brake booster blowen .timming off ,

Posted on Jan 16, 2009

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Engine vacuum line diagram for 03 grand marquis 4.6


The vacuum line diagram is under the hood on the federal emissions decal. Any other vacuum related diagrams are in the Ford electrical and vacuum troubleshooting booklet. You can buy these used on eBay for less than $20.00 US

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sounds like your axle isn't engaging. Check to make sure there is power to the axle servo.

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Do you mean RPM? The vehicle is idling too high? It's probably a vacuum air leak---check all your air lines to make sure they are connected to the right place, and not cracked or broken.

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2001 Ford Taurus low Idle at stop lights


I would make sure all connections on your filter housing is tight..Make sure theres nothing disconnected far as vacuum lines..If you have had your oil changed lately,,check the two lines that hook right where the air filter is..The jiffy lube places,,love to leave them off..If all is good i would suspect the idle air control valve

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2002 ford f150 four wheel drive front hubs not going into fourwheel drive


Is the system ESOF ( Electronic Shift On the Fly ) or MSOF ( Mechanical Shift On the Fly ) ?

If you have already tested to find the front drive shaft locks into place, and the front axle is the cause, looks to the front vacuum disconnect shift motor.
Item #10 in the parts diagram below :
sscullys_1.gif

Close up of it ( this is a picture from another person's bracket that broke ) :
sscullys_51.jpg

Chances are the vacuum lines to the vacuum disconnect motor are cracked, the vacuum solenoids are not working correctly, or the vacuum to the solenoids is having an issue ( the reservoir ) :
Vacuum diagram for the shift motor
sscullys_52.jpg

The pink line is vacuum for 2WD operation ( unlocks the axle ) the light blue vacuum line is for 4WD operation ( locks the axle ).

You can test right at the vacuum disconnect motor with a vacuum gauge with the motor running. Unplug the shift motor, and check for vacuum right at the motor.

Could be the shift motor has a damaged diaphragm and not holding vacuum or has water in it ( saw that 1 time ).

Start with checking for vacuum. Also check the fuses for the vacuum solenoids, the power is always at the solenoid, ground is switched on and off by the GEM ( Generic Electronics Module ) to operate them

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Rear air not switching between hot and cold, any suggestions?


the real air switch on the dash, check and make sure the vacuum lines have vacuum on 1 of them, the other goes to the rear air assy. usually that switch is going bad internally and wont hold enough vacuum to send back, esle it is the vacuum motor in the rear air.

May 16, 2010 | 1998 Ford Windstar

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I need a vacuum line schematic for a 2003 Chevy Astro Van. My AC only blows out of the defroster vents. I've replaced 2 lines so far but it has not fixed the problem yet.


Replace the complete heater control vacuum line over the motor with rubber vacuum tubing.
The heater vacuum line connects on the drivers side of the engine halfway back on the intake manifold.Run the new line to the heater vac connection at the passenger side at the right front in the engine compartment.
I change 2 a week....this should be where your problem is.

Sep 09, 2009 | 2003 Chevrolet Astro

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What will make the engine idle surge up and down when sitting?? if you give it a bit more gas it evens out .It turns over like a champ but once it starts the idle is up and down,although when driving it...


definitely a vacuum leak. do a visual inspection to make sure all of the vacuum lines are connected. if possible, use a service manual to make sure they are all in the right places. make sure the intake manifold bolts are tight, as well as the throttle body/carburetor bolts. an easy way to check for vacuum leaks is to use a can of carburetor cleaner. DO NOT DO THIS WHEN THE ENGINE IS HOT!! let the engine idle, and pray the carb cleaner around the vacuum lines and fittings. if you spray a leak, you will hear the idle go up very suddenly, or it may start to stumble and try dying. but it will be very noticeable when you do find the leak with this method.

Aug 31, 2009 | 1986 Honda Accord

2 Answers

I have a 1985 mercedes benz 190D i just had a starter put in, i notice that my vacum lines are not on the right lines my car stayes on when i try to turn it off. i need to know where each vacum lines goes....


rbbnsent: Let me see if I can help you.Fird, your vacuum lines are color coded if you look closely. As they age, some of them get difficult to differentiate from. One place where you can positively ID them, is where the line has not been exposed to the elements. That is where they have been inside a vacuum hose.
Ready?
Starting off, the vacuum line which shuts off the engine is a brown/blue line it goes to a diaphragm that has the fitting facing parallel to the pump body (runs parallel to the ground) Hook the line into the diaphragm.
Next, you have a vacuum hose which has a check valve on it.
Connect this one to the fitting which runs straight up.
There should be a white line near by. Hook the line up to the fitting just behind the one you just hooked up.
There should be a Black line going into the back of the pump.
Alright, coming off the vacuum pump, you have a fitting which should 4 lines excluding the vacuum source.
Now the vacuum source should have a check valve in line with it.
The following colors should be going into this "T"
White, white/blue, green, white/black.
Going back to the injection pump: Coming off the line which had the check valve, one direction is white/violet/brown and the other direction which heads off in the same direction as the front of the motor, is black.
The Black line coming out of the back of the pump hits a "T" which goes to a check valve and it hits another "T"
Coming off the side of that "T" is a white/green
I'm pretty sure, I have far exceeded the number of vacuum hoses which you found disconnected.
I hope I have answered you question thoroughly.
I happen to drive a Mercedes Diesel (81 300TD wagon) I love it!
Let me know how you make out. Mercedes Diesel are a specialty of mine!

Apr 24, 2009 | 1985 Mercedes-Benz 190

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