Just want to thank the contributors to this thread, especially xjcamaro89, for a great, informative series of posts. I have a manual but this gives it a better perspective with some real world situations not covered in "the book." This oughta be a sticky but I have printed it out and filed it away in case I have trouble.... plus I put a vacuum line inspection on my PM list. Good work!
Your welcome. This thread is actually in the tips and tricks sticky at the top of the main 04-08 page. I really think this article has help a tremendous amount of people, not only here, but on other boards as well.
Great info - I wish I would have seen this over the summer. We were on vaction when we heard this awful sound while we were going down the freeway. Not the type of sound you want to hear on a brand new truck you that you only had for 6 months (2008 F150). The dealership said that the vacuum line had come off the right front and they has seen this problem before. The electric lock up on the fan also went out on this trip causing the engine to get hot. I guess I made somebody mad. I will have to read this post again to prevent future problems.
Hey guys, Just want to remind you all that if your still getting the grinding, and can find NO other reason, go to O'Reilly's and get 2 of the HELP! brand vacuum check valves and replace the two in the system, one between the intake and the solenoid, and one in the tee before the solenoid
I had this problem, could figure it out for the life of me, until i tested the check valves by mouth. Ya, suck in and blow out on them. if they let air both ways, even a little, replace them. The whole assembly from ford is expensive, the parts are like 5 bucks.
My '04 is gone, traded, but I'll never forget getting that figured out.
__________________ These are not the Droids you are looking for.....
Current vehicles:
98 Contour 2.0L auto, my new DD 49K 30mpg
2009 Dodge Grand Caravan SXT 3.8L 6sp auto
1986 F250XL Diesel RC LB 4x4 T19 4spd 4.10's?
Just wanted to verify what I read... My truck will switch from 2wd to 4H and into 4L just fine but when I try to go back to 4H from 4L or back to 2wd it sometimes takes minutes. I usually end up having to mess around with the throttle and 4x4 knob and pray. Does this sound like the solenoid?
No, sounds like you need to be in Neutral (instead of park) when you shift out of 4L. (binding a little maybe in park.) 4L is not a shift on the fly setting. only between 4H and 2wd can you shift moving. 4L, as I've always done it, is stopped. Older Mechanical shift said you can be going up to 5mph. Never tried it.
__________________ These are not the Droids you are looking for.....
Current vehicles:
98 Contour 2.0L auto, my new DD 49K 30mpg
2009 Dodge Grand Caravan SXT 3.8L 6sp auto
1986 F250XL Diesel RC LB 4x4 T19 4spd 4.10's?
OK, I'm brand new here and just bought a 2006 4x4 with manual 4wd shift. I drove it for the first long drive last week (about 400 miles), and twice at highway speeds (50-65) I heard a light grinding sound from the front left. The first time I pulled over and the sound just went away when I stopped. The second time as I slowed to a stop I heard a light "clunk" and the noise went away. Does this sound like an IWE problem? The 4wd system worked fine the couple times I used it prior to the loger drive.
I sure miss my '92 4x4 with the simple manual hubs...
Yes. Sounds like the left IWE actuator is bad. The clunk you hear is the vacuum reaching a level when your slowing down that allows the IWE to completely unengage. When driving the vacuum drops at different RPMs and is allowing the IWE to try to engage.
Well, I already picked up the Haynes book today, so it looks like I'll be getting to know this new sytem. Thanks a lot for all the info you have provided relating to this stuff. G
...well now I'm even MORE grateful for your detailed instructions, as the Haynes manual says not a GD thing about the IWE system, even though it says it covers 4wd. What a piece of published crap! The manuals I've bought before actually covered most stuff for the vehicles. Again, thanks for your information.
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