1991 Explorer - Vacuum Lines

The stock factory vacuum lines are horrible! Replace them with silicone! I can't recommend this enough. It's cheap and cuts out a lot of need to worry about lines cracking or leaking.
I bought this particular vacuum line from eBay seller first.racing, just do a search for the following:
10 Feet Blue ID:5mm (3/16") Silicone Vacuum Hose Tube High Performance

[@isaacfrench4908]

4 years later. Still helpful👍🏽

[@brentmaveric4981]

I fixed it Nate. thanks for the good camera work. I knew what to look for.

[@thementalcoach]

Very helpful! Thanks for posting it. Another tidbit for fellow 1st Gen owners is that the gasket on the booster valve can crack (or disintegrate, like mine did) , causing a vacuum leak. FYI I'm davidk on the Explorerforum - '93 Explorer 253K miles.

[@HsCSpanky]

Mine did the same. It made a vacuum leak so loud that I could hear it with the hood closed. Engine still ran great though :) I'm natenkiki2004 on the Explorer Forum

[@harvestblades]

Brake booster gasket?

[@HsCSpanky]

What we're talking about is the rubber gasket on the brake booster. There's a plastic valve that the brake booster hose connects to, that valve is held into the brake booster with a rubber grommet/seal. That will crack and leak like crazy. You can visually see the cracks if you look close. If yours doesn't have any, don't worry about it.

[@harvestblades]

Wasn't sure if that was what he was referring to. I would sure like to find a local source for some silicone hosing to do mine tomorrow.

[@HsCSpanky]

I put some more pictures and info on my ExplorerForum post, do a search there for silicone vacuum line.

[@growinggoodskauai9392]

Thank you thank you thank you!! I took my truck apart months ago and forgot where the vacuum lines went! You should tag the 94 Mazda b4000 in your video as the ranger and Mazda used the same engine at this time... I was just about to lose my mind when I found your video, thanks for saving me all the time and money I would have lost for the murderous rampage I almost went on! :)

[@HsCSpanky]

Good idea, I'll do that. I'm glad this video helped you out :)

[@harvestblades]

Yep I have the '94 Mazda Navajo w/ the 4L OHV, pretty much the same thing.

[@jackvaz1429]

finnally i found what i needed too!!!

[@DanyLopez-ox7qr]

Muchas gracias por tu video, hace poco me di cuenta que algunas mis lineas estaban rotas o faltaban, ahora ya se como conectarlas. Saludos.

[@addiction2friction]

I love you Nate! Not many 4.0 ohv videos❤️

[@pablocortes2709]

Thank you! Very helpful !

[@brianphillippe1694]

very helpful! i have a 91 xlt ranger 4.0 very much identical.

[@w00derice]

Right on, just replaced all the old brittle lines on my 93. Haven't had issues with the new t-caps yet, but I'll keep an eye on it. Btw, I'm thevishnu on explorerforum.

[@kevinricardo7785]

What size vaccum hose did you get for your 93...?

[@w00derice]

@@kevinricardo7785 It’s been awhile, so if I recall I used some 3/8’s. What I did was yank off some of the rotten and went into O’Reilly and bought a few feet each of what I needed. Always handy to have extra random sizes laying around anyway.

[@Tom-wq2mz]

The grey line for the ac if not connected the ac blows hot where does it plug into thank you

[@lmt-adventures620]

I’m new to car projects, currently have a 95 Explorer Expedition (4.O V6 EFI) 4x4, got her to start but bad idle. Guy he removed AC system which I don’t plan to replace as this will be a off road vehicle, but he cut a lot of stuff now I have a green and a white small vacuum line by the battery on right side of engine bay when facing vehicle and I’m Not sure where they go to. I need to reconnect them but I need help to know where they go. I like your video learned a lot I’m wondering if you could provide me with some guidance. Also, would your vacuum line diagram be the same as mine?

[@HsCSpanky]

First, best of luck in your project! Unfortunately the 1995 is the first year of the second generation, totally different from the one in the video. I would recommend looking on eBay for a evtm manual for the 1995. It will tell you everything about the vacuum and electric lines. Honestly though, as long as the vacuum lines are connected, that's all there is to do. Doesn't matter where lines are connected, it's all the same vacuum. Just make sure to plug any unused vacuum ports so you don't have a leak. A small vacuum leak won't hurt idle that much. A vacuum leak big enough to mess with idle you'd be able to hear the scream of air. I'd look at spark wires and coils, a common issue on these.

[@RFTsanchez]

Hello, I have a 1994 explorer, with the a4ld transmission, the other day, testing the vacuum lines, I blew the hose that goes to the transmission vacuum modulator, the impression I had is that the air was flowing, that is, there was no pressure, it seemed that the air I blew was coming out somewhere, and I thought, if it comes out, it can also come in... my question is is this normal or should it generate pressure. I notice that the shift to second is bad, high revs when, especially with the car cold. thanks for your attention.

[@hansvarca3616]

thanks mate it helps me !

[@jessejefferson2065]

I can't find the port that goes too fuel pressure regulator

[@AFHero66]

Nice video. What did you do with the capsule-shaped vacuum reservoir?

[@ghj1502]

The evap system (charcoal canister)?

[@AFHero66]

@@ghj1502 the one by the A/C system.

[@ghj1502]

@@AFHero66 Cant answer there my car doesnt have ac. Hope you find out

[@ghj1502]

@@AFHero66 Check out the TRS site on technical info

[@kevinricardo7785]

What size vaccum hose is that? I would like to get some.

[@javiermarin1201]

Thanks very good!!!!!

[@juanarmendariz9943]

Thanks for sharing! Helped alot!!!!

[@xzavierlouis4162]

I know it is kinda off topic but does anyone know of a good place to stream new tv shows online?

[@xzavierdean7822]

@Xzavier Louis lately I have been using flixzone. You can find it on google =)

[@gerardoephraim2617]

@Xzavier Dean yea, I've been watching on Flixzone for months myself :)

[@xzavierlouis4162]

@Xzavier Dean thank you, I signed up and it seems to work =) I really appreciate it !

[@xzavierdean7822]

@Xzavier Louis glad I could help :)

[@jamiepw77]

Do you still have the truck? I have a 1986 Ford Bronco 2 that had an engine change to a 1st generation 150.. your engine configuration looks exactly like mine except I got it vroken and missing alot... I am looking to see if you can show me where the pcv valve hose is routed to.

[@HsCSpanky]

Hi, it's hard to see in the video but the PCV is located right below the vacuum tree. If you pause about 55 seconds into the video, there's a silver ring on top of the valve cover and that's the PCV. I don't have the truck anymore unfortunately but I believe the PCV has it's own port right below the vacuum tree, it's a right-angle piece and very short.

[@jamiepw77]

@@HsCSpanky thank you absolutely right .. i think I am almost there...

[@HsCSpanky]

@@jamiepw77 no problem, good luck on your project. I do miss tinkering on these ford's.

[@vikingking4724]

could you go a little more in depth on which hose is the cruise control? i am having some rough idle issues with my 94 Mazda b4000 and i found that a hose is loose and cannot figure out where it is suppose to go, thanks!

[@HsCSpanky]

VIKING KING it really doesn't matter where the hoses go, just follow the hoses away from the upper intake junction and make sure they're secure and don't have any holes or cracks. I do remember that the cruise control vacuum line is a thicker rubber hose. While it could be cracked, the small plastic lines for the fuel pressure regulator and heater controls are far more suspect. They go behind the engine and over to the passenger side by the air box.

[@vikingking4724]

That's the problem, the hose popped off while starting it and I could not find it after an hour of searching, it was the forward of the 3 that you tied together

[@HsCSpanky]

VIKING KING alright, the cruise control hose is going to be on the driver's side, coming from a black circular plastic device about the size of a coffee cup. I think it's mounted behind the coolant reservoir on the fender.

[@vikingking4724]

Thank you, sorry I am stubborn, I have been messing with it for days to no success

[@HsCSpanky]

VIKING KING no problem, I know how that is. I might make another video about where the stock vacuum lines go.

[@rhondacannon493]

Having trouble finding vaccum hose on e-bay. could you give me more info there's a 2 mill 3 mill 4 mill hoses

[@HsCSpanky]

I just did a search for "5mm silicone vacuum hose" on eBay and found quite a few. Give that a try.

[@alexanderwebb680]

Are they 5mm inner diameter?

[@vincenthernandez3127]

👍

[@edwardanthony7283]

It's made like total garbage.

[@chadrobert6017]

Could you not chew gum and smack your lips during videos otherwise very good video