@@patrickcarney3110 sounds like you need to replace the solenoid. Luckily that's an easy fix. When you turn it to 4WD you should have no vacuum at the solenoid to allow the hub actuators to engage.
Would air leaking out of these hoses cause issues like rpm’s being higher while the truck is in park? Or would that be moreso the vaccum hoses on top of the motor, Air Mass Sensor, Throttle Body, and etc?
I vacuum system is isolated by a check valve and solenoid so unless those have both failed and you have vacuum leak I don't think so. If the RPM is going up, it can indicate several problems with the vehicle such as a vacuum leak, bad spark plugs, an air intake issue, a fuel delivery problem, or an exhaust blockage.
Jacob..I have a 2019 F150 . Due to noise on lft side , I replaced one 4wd actuator and hub as well as axle. Seemed to work fine, But now that the weather is cold, it takes over a mile for the actuators to disengage to 2wd. Normal? Also on your parts listed, do I need the lower lines or does the main line inlcude everything? thanks
@@ccausey5512 I've noticed that it sometimes it takes a few hundred yards for the hubs to disengage. If you're not going very fast and let off the gas it helps to disengage at lower speeds. If you plan to replace the lines yes you will need the lower sections of line. The best way to test the lines is with a vacuum pump to see if they hold vacuum pressure.
Thanks... The cold weather seems to have affected the timing of the 2wd. I ordered the lines.. figured couldn't hurt... Thanks again d@@jacobsupgrades
@ yea the cold weather can wreck havoc on the 4WD. That's usually when I've seen problems with it too. You might want to pull the vacuum line off the solenoid and make sure it's engaging too. That could be your problem.
So there was an issue with one of the links that you posted in the description. The two additional lines that you had to order that connect into the actuator along with into the vacuum line if that makes any sense, when I click on that link, it tells me that the page cannot be found. Can you by chance post another link to where I can find those two additional lines that I need to order?
@@leematrix801 thank you for letting me know. I've updated the link, here it is Lower Lines vacuum hose connector tube (2 needed) - FL3Z-3C125-A - amzn.to/49r2Ne2
@Dyna2023, I just plug them in and make sure to seat the rubber line all the way down. I wouldn't use silicone incase you need to take the connection apart you'll just damage the line.
I actually found your first video where you tested the lines as well. What was different this time? Just curious because I replaced my hub and actuators and wondering if I should replace the vacuum lines as well.
@robertstreett5766, the lines tested out fine previously but later on showed vacuum loss. I'm guessing it was a hairline crack somewhere in the line that didn't show its self previously. If you replaced your actuators and think you solved your problem they could be fine but it's good to vacuum test them to verify. It's also good to test the actuators that you installed. I had a new one fail on me right away. Here's my full video for diagnosing the 4WD system. ua-cam.com/video/fa0vKrLtqbA/v-deo.html
@@andrewb2332 Main 4x4 Vacuum Line - FL3Z-7A785-A - amzn.to/47odnkd #commissionsearned Lower Lines vacuum hose connector tube (2 needed) - FL3Z-3C125-A I bought these at my local Ford dealer because I had a hard time finding them.
It looks like it's a similar process and concept but I'm sure the routing is a little different. Here's the part numbers for the vacuum line from the solenoid to the hubs. 2017 F350 4WD vacuum lines HC3Z3C12 4A (2) HC3Z3C12 5B I found these here with a diagram parts.lakelandford.com/a/Ford_2017_F-350-Super-Duty/132422519__11605616/Front-suspension-Vacuum-controlled-components/ME17411.html#1
Great video. You mentioned you thought it was the lines because you changed the actuators…is this because you continued to hear grinding after the new actuators were installed.
@roberstreett5766, yes I continued to hear and feel a whine at the front end under the drivers feet. I put my go pro under the truck and found out the front axel and one cv was still spinning. Since I replaced the actuators already I thought it could be the vacuum line so I vacuum tested them. Turns out it was a cracked line but also one of the new actuators failed and needed to be replaced.
Yes! It should apply to all engine types as long as its 4WD from 2015 to 2020. Same concept applies to other years but the part numbers may be different.
Great video ! I am really curious how many hours it took you to do this. I was just quoted by my local Ford Dealer $1,138 they broke it down like this $138.00 for parts x 50 hrs labor. Of course I suspected they're just hi balling me because they don't want to do it, but I don't know. Would be interested to hear your thoughts. This video will be a great help because it looks like I will be doing it myself.
@@jjoyceman thank you! It's not that hard of a job, only a few tight spots. I spent a couple hours trouble shooting and replaced the vacuum lines in under 2 hours once I had the parts.
@@eoncapital007 I agree there are some tight spots that the vacuum line runs through making it hard to get on camera, I almost need an pen camera. I prefer manual locking hubs over vacuum but the convenience for everyday and snow driving is hard to beat.
@@davidwatts1856 I agree it's a pain when these things fail. I've heard you can swap out the vacuum hubs for manual lockers but you'll lose the ease of engaging them on the fly.
Holy cow was this easy. 70000 thumbs up to you man. Saved me loads of time
Thank you for the comment! It's really not bad to trouble shoot, it helps to have a vacuum pump.
@@jacobsupgradesI’d imagine. I had raccoons chew my lines though! I knew they weren’t holding pressure! lol. Thank you again!
@@codydoerzbacher7864 lol well that's much easier to diagnose. Those dang critters. I'll bet you have a live trap out by your truck now lol.
Great video. Turns out my solenoid is drawing vacuum in 2 Wheel Dr. and in four-wheel-drive. Can you “unstick” them or is replacing the only option?
@@patrickcarney3110 sounds like you need to replace the solenoid. Luckily that's an easy fix. When you turn it to 4WD you should have no vacuum at the solenoid to allow the hub actuators to engage.
Good job señor. Thanks
@@pastorramirez5083 Gracias Mi Amigo!
My F-150 has had the dreaded grinding rattle. Wasn’t sure how difficult this is but it seems pretty straightforward.
Thanks!
This is much easier than replacing the IWE's! Glad to help.
Would air leaking out of these hoses cause issues like rpm’s being higher while the truck is in park? Or would that be moreso the vaccum hoses on top of the motor, Air Mass Sensor, Throttle Body, and etc?
I vacuum system is isolated by a check valve and solenoid so unless those have both failed and you have vacuum leak I don't think so. If the RPM is going up, it can indicate several problems with the vehicle such as a vacuum leak, bad spark plugs, an air intake issue, a fuel delivery problem, or an exhaust blockage.
Jacob..I have a 2019 F150 . Due to noise on lft side , I replaced one 4wd actuator and hub as well as axle. Seemed to work fine, But now that the weather is cold, it takes over a mile for the actuators to disengage to 2wd. Normal? Also on your parts listed, do I need the lower lines or does the main line inlcude everything? thanks
@@ccausey5512 I've noticed that it sometimes it takes a few hundred yards for the hubs to disengage. If you're not going very fast and let off the gas it helps to disengage at lower speeds. If you plan to replace the lines yes you will need the lower sections of line. The best way to test the lines is with a vacuum pump to see if they hold vacuum pressure.
Thanks... The cold weather seems to have affected the timing of the 2wd. I ordered the lines.. figured couldn't hurt... Thanks again d@@jacobsupgrades
@ yea the cold weather can wreck havoc on the 4WD. That's usually when I've seen problems with it too. You might want to pull the vacuum line off the solenoid and make sure it's engaging too. That could be your problem.
So there was an issue with one of the links that you posted in the description. The two additional lines that you had to order that connect into the actuator along with into the vacuum line if that makes any sense, when I click on that link, it tells me that the page cannot be found. Can you by chance post another link to where I can find those two additional lines that I need to order?
@@leematrix801 thank you for letting me know. I've updated the link, here it is Lower Lines vacuum hose connector tube (2 needed) - FL3Z-3C125-A - amzn.to/49r2Ne2
Do you just plug in these lines, or use silicon or some sealer to make sure they don't leak at connection?
@Dyna2023, I just plug them in and make sure to seat the rubber line all the way down. I wouldn't use silicone incase you need to take the connection apart you'll just damage the line.
I actually found your first video where you tested the lines as well. What was different this time? Just curious because I replaced my hub and actuators and wondering if I should replace the vacuum lines as well.
@robertstreett5766, the lines tested out fine previously but later on showed vacuum loss. I'm guessing it was a hairline crack somewhere in the line that didn't show its self previously. If you replaced your actuators and think you solved your problem they could be fine but it's good to vacuum test them to verify. It's also good to test the actuators that you installed. I had a new one fail on me right away. Here's my full video for diagnosing the 4WD system.
ua-cam.com/video/fa0vKrLtqbA/v-deo.html
What part numbers and where did you order them from ??
@@andrewb2332 Main 4x4 Vacuum Line - FL3Z-7A785-A - amzn.to/47odnkd #commissionsearned
Lower Lines vacuum hose connector tube (2 needed) - FL3Z-3C125-A I bought these at my local Ford dealer because I had a hard time finding them.
Would this also apply to a 2017 f350, or would it be completely different?
It looks like it's a similar process and concept but I'm sure the routing is a little different. Here's the part numbers for the vacuum line from the solenoid to the hubs. 2017 F350 4WD vacuum lines
HC3Z3C12 4A
(2) HC3Z3C12 5B
I found these here with a diagram
parts.lakelandford.com/a/Ford_2017_F-350-Super-Duty/132422519__11605616/Front-suspension-Vacuum-controlled-components/ME17411.html#1
Great video. You mentioned you thought it was the lines because you changed the actuators…is this because you continued to hear grinding after the new actuators were installed.
@roberstreett5766, yes I continued to hear and feel a whine at the front end under the drivers feet. I put my go pro under the truck and found out the front axel and one cv was still spinning. Since I replaced the actuators already I thought it could be the vacuum line so I vacuum tested them. Turns out it was a cracked line but also one of the new actuators failed and needed to be replaced.
Would this be the same for the 2016 f150 xlt 3.5 eco boost?
Yes! It should apply to all engine types as long as its 4WD from 2015 to 2020. Same concept applies to other years but the part numbers may be different.
Mine are all cut up and pinched closed and idk why bought it used
@@JesusVazquez-nf9dx new Ford lines are easy to install only a few tight spots.
Great video ! I am really curious how many hours it took you to do this. I was just quoted by my local Ford Dealer $1,138 they broke it down like this $138.00 for parts x 50 hrs labor. Of course I suspected they're just hi balling me because they don't want to do it, but I don't know. Would be interested to hear your thoughts. This video will be a great help because it looks like I will be doing it myself.
@@jjoyceman thank you! It's not that hard of a job, only a few tight spots. I spent a couple hours trouble shooting and replaced the vacuum lines in under 2 hours once I had the parts.
@@jacobsupgrades That's about what I figured a few hours should do it. Well I'll find out. Thanks for the video it's going to help a lot !
Good video, but hard to tell the orientation/side of the shots sometimes. Bad design by Ford of this system..
@@eoncapital007 I agree there are some tight spots that the vacuum line runs through making it hard to get on camera, I almost need an pen camera. I prefer manual locking hubs over vacuum but the convenience for everyday and snow driving is hard to beat.
One of the stupid things to put on a 4x4.. vacuum lines that brakes so easily.
@@davidwatts1856 I agree it's a pain when these things fail. I've heard you can swap out the vacuum hubs for manual lockers but you'll lose the ease of engaging them on the fly.