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1998 ford f150 4.6 vacuum diagram

Did head gasket now motor has a shifting issue

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: blown head gasket

I would change both, as well as use new head bolts. Make sure your heads are not warped or cracked, especially the one that is leaking. There may not be any need to change the head if it is not cracked. These are prone to blowing a gasket especially after 150K miles or so. It will not cost a huge additional amount to change both head gaskets since the engine will have to be disassembled down to the heads anyway. Hope this helps you, Rick

Posted on Apr 18, 2009

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SOURCE: vacuum line diagram for 1998 windstar

look on the engine compartment either on the finder or the hood

Posted on Dec 13, 2009

johnjohn2
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SOURCE: need a vacuum diagram 1998 ford explorer v8 2wd

heres a vacuum diagram for a 1998 ford explorer with the v-8 engine, hope this helps,0bf912a.gif

Posted on May 11, 2010

ZJLimited
  • 17970 Answers

SOURCE: I need a vacuum diagram

Check this...

b051ec2.jpg

Fig.: Vacuum hose routing for 1995-99 Explorer/Mountaineer models with the 4.0L engine (click for zoom)

I hope helps, remember to rate and comment this answer.

Posted on Oct 06, 2010

ZJLimited
  • 17970 Answers

SOURCE: Ford 1998 Windstar Vacuum Diagram

For 1998 Ford Truck Windstar 3.8L SFI 6cyl check this...

zjlimited_359.jpg

Fig. 1: Vacuum distribution schematic-3.8L engine

zjlimited_360.jpg

Fig. 2: Vacuum distribution schematic-3.8L engine


Hope this helps (reember to rate this answer).

Posted on Dec 29, 2010

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1 Answer

Why is there a misfire detected-cylinder number 4


Any one of several reasons

Ignition to that cylinder is week or not there at all

Injector issues-too rich,too lean or dead

Vacuum leaks almost anywhere

Mechanical damage-failed valves,head gasket,
intake gasket

Could keep going depending on motor design

Dec 12, 2012 | 1998 Buick LeSabre

1 Answer

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

Dec 17, 2010 | 2002 Ford F150 Regular Cab

3 Answers

I have a 1998 ford ranger 4 cyl it misses on #4 cyl I have changed plugs and wires also changed injectors around ( #4and #1 ) still misses on #4 this problem happend sudenly one day it was...


Have a compression test done ,and look for a vacuum leak near the cylinder,like a vacuum hose or intake gasket.If the compression test shows a fluctuation between the 3 and 4 cylinder,then the head gasket would need to be replaced.

Aug 14, 2010 | 1998 Ford Ranger SuperCab

1 Answer

The transfer case will not shift into 4 wheel hi or low 4 wheel drive auto with elect shift


I would suspect the vacuum disconnect motor or the vacuum solenoids for the disconnect motor ( or the vacuum lines ), but best to confirm
Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

With the engine running ( and wheel chocked, parking brake on ) have someone shift into 4WD, and watch the shift motor to see if it operates
It is on the front axle, looks like this
85ec248.jpg

If the disconnect motor does not shift, you can check the vacuum on the lines with a vacuum gauge. Blue line is 4WD operation, pink line is 2WD operation.
The vacuum solenoids are on the firewall, and look like this
50a3265.jpg

This is the block diagram for the ESOF vacuum operation of the disconnect motor.
c01c924.jpg

This is assuming you have checked the fuses for the transfercase shift motor, and the vacuum solenoids.

Feb 16, 2010 | 2000 Ford F150 Flareside SuperCab

1 Answer

Actuator motor barely moves when trying to lock in 4x4. not sure if vacuum switches are bad or if its the actuator or what.


Could be a problem with leaking vacuum lines either from the vacuum solenoids to the shift diaphragm, or from the vacuum reservoir to the shift solenoids.

You can try a vacuum pump on the shift diagram, and see if the operation improves. Be careful about moisture in the shift diaphragm, might want to use the vacuum adapter for bleeding brakes, to stop the vacuum pump from ingesting water.

If the operation is better, start with vacuum line testing at the shift diaphragm doing a vacuum reading and hold test with a gauge.
I would suspect a cracked vacuum line, just taking a SWAG.

Dec 19, 2009 | 1998 Ford F150 Regular Cab

2 Answers

1998 f150 4x4 not working


Check BJB ( aka Battery Junction Box, Engine Compartment fuse panel ) Fuse #17. This is the power to the Transfer Case shift relay, which powers the Shift motor in the Transfer case and power to the magnetic clutch coil ( via the transfer case relay ).

The other fuse to check is the CJB ( aka Central Junction Box, cab fuse panel ) Fuse #23.

If both fuses check good, time to check for power on the connector for the shift relay and the shift motor. The power from BJB Fuse # 17 is the Dark Green w/ Light Green stripe ( this is hot at all times ).
The old school test is to lightly hit the back of the transfer case, to see if the shift motor is hung up.
Here are the diagrams, so you can see what I am talking about.
4068e7c.jpg
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1fec4e1.jpg

Dec 18, 2009 | 1998 Ford F150 Regular Cab

1 Answer

1998 f 150 will not shift into 4 wheel drive checked some fuses and lines seem to be in place. makes no sound of even trying to shift


If this is the electronic shift, it is likely the shift motor on the transfer case has gone bad.

It can also be other issues, switch, wiring harness, connector, or PCM issues, probably best to take to a good Ford mechanic or dealership.

Scary thought for you-that motor starts around $350 and goes up depending on model.

Oct 09, 2009 | 1998 Ford F150 Regular Cab

1 Answer

When i try to shift into 4wd it grinds or clinks but no engage


the transfer case motor is electric, the hubs are operated by vacuum.

Mar 14, 2009 | 1998 Ford F250 SuperCab

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