1984 GMC Vacuum Line Trace Out SOLVED! Part 2
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- Опубліковано 24 тра 2018
- Part 2: how to trace out your vacuum lines on most vehicles from the late 1970s through the 1980s and into the '90s. I chose this 1984 GMC Jimmy because it offers a complicated system covering all components of the vacuum system including the tip in vacuum switch, distributor, EFE, carburetor, air cleaner, temp sensor, vac motor, manifold vacuum source, EGR valve, EGR bleed solenoid, distributor delay valve, PCV valve, thermal vacuum switch, TVS, air pump, TCC, Auto Trans Lock-Up Torque Converter Switch, deceleration valve, cruise control and the vacuum canister (plus who doesn't love a square body).
Part 1: • 1984 GMC Jimmy Vacuum ... - Авто та транспорт
I'm replacing rotten Vac lines on a 83 Vandura and this is exactly what I needed to help me figure out the diagram. Thanks for posting!!!
i have a 85 K5 and need to go thru that myself, but every time i look at that maze of tubing i get discouraged. You are a very patient guy, lol. Thanks for the video
Its no joke. Pick the biggest one and start there;)
Kuddos for doin a vid like this! All the other vids I saw,were of people deleting these lines and components. I have an '86 Silverado that has a similar spiders web of lines that I ended up figuring out myself, because no one else, apparently, liked the same idea.lol. Keep up the good work!!😀👍
Thanks!
great video
my diverter valves on the "YKD" engine family 7.4l 454 take a larger diameter emission hose than the usual 1/8" inner diameter. And it also has one additional port of the usual 1/8 dia. wher as the rear diverter valve at the rear right bank has only the one larger port. And although similar to yours because of 1986, differs cause yours has a slightly varied connection diagram. Nice Viideo. And I love the name of your channel.
I have an 84 CHEVY G30 motorhome with yhe 350 and california emmissions... I took all the hoses out because almost all have been dry rot. THAT WAS A YEAR AGO. I cannot get this thing hooked up right. All diagrams online are barely helpful and blurry, i dont know if a device is broken or if the vacuum lines are routed wrong.
I wish I could just strip off all of the extra "emmissions" crap!
Thank you for this video, it has been a tremendous help
Glad it was helpful. California is a bear for sure!!!
You the man! Thanks much was needing to see that Cause i got it all fucked up!
I agree, this was super helpful. You mentioned that you were also going to show how the cruise control is hooked up as well. Are you planning to do another video? I just purchased a 1985 Chevy K10. The guy before me put in a rebuilt motor and a Holley Carb, but didn't bother to hook anything up in the vacuum system or the cruise control. I have some conversations to have with Holley regarding adapter plates for the TV cable and accelerator cable, but your video gets me a long ways on everything else. Now i just need some help with the cruise control.
I have every intention of putting it up. Maybe I can knock it out this weekend! I had the transmission rebuilt because the person before me never hooked up the torque converter clutch vacuum...;(
@@montanamade1114 I bought an 84 with 305 that has a huge line on drivers side thats blocked off. I see that yours is connected and that mine is missing pieces. Looks like there is a large diameter metal pipe that is vertical. I watched both of your videos hoping you would show it. Please help?
This was super helpful bro
I super need the second video
Check out my channel. The first video is up showing the trace out of the remainder of the system. I will also put a link in the description to it. Glad it was helpful.
Lukes Garage I subscribed already
Can I send you a pic to ask you a question
I was only lost one part
The choke has a hose that goes to it but I’m not sure were it hookes up to because your truck didn’t have it were mine is at
Your probably has it behind the carb
You bet. MontanaLuke01@gmail.com. What vehicle is it on?
@@MechanicLife hey Luke, I'm tracing mine and it's not quite right with how it was hooked up. I went to go put the second port that you said should go to a stainless line to the efe. my stainless line is gone.... can I just cap it?
You can cap it, but here is whats happening. The EFE is a valve that closes when the engine is cold causing exhaust to move over the manifold. This causes it to heat up to evaporate fuel so it doesn't pool in the intake.
What lines would I need to just run the vacuum system for the AC vents? Thanks
Good job on the video. I had high hopes but I'm still just as confused as I was. I have a 84 GMC 3500 van 1 ton and it all looks different. Any help would be greatly appreciated.
Awesome video! Was hoping to see the vacuum lines for the cruise control unit. Posting anything about that soon?
I hope to get it done soon! Lots of requests for it for sure. Been busy like its cool!
Looking for the wire that connects to the idle control solenoid on the carberator ot was removed on mine is it connected to the wire harness with 2 plug on the firewall
I'm lookin for that distributor 4 port delay valve can i just put 2 separate ones
No part 3? I have a 1983 suburban and the i cant find out where the cruise control gets its vacuum from. Pleas help the hose just wraps around the back of the block and just lays there in the front.
You didn't mention the Rear Vacuum Break Assembly or the Secondary Vacuum Diaphragm.
Very informative videos. This will help me this weekend. Quick question. On your Manifold Vac. Source.. The vacuum hose on the top, where does it go?.. I noticed you have it connected to a check valve and split into two lines.
Nevermind. I was able to figure it out. One line goes to the accumulator tank and other goes to a/c controller on the firewall.
Excellent video. Extremely helpful for the home mechanic. Are the 350 and the 305 the same. I have a 1885 Chevy K10 with a 305 that the last owner ripped almost every vacuum line off and I am trying to get running as I restore it to the factory settings. Do you know if someone make a complete kit that someone can buy to replace and restore all the vacuum/emissions hoses and valves? Thank you.
They are very close to similar. I did a 350 swap on this Jimmy and used all the same routes. I dont know if there is a kit though. That would be awesome!
These videos were a huge help in trying to figure out all of the cut and blocked off vacuum lines I have. Can you tell me what the tip in vac switch on the passenger side firewall does? I’m getting conflicting reports when I search it
Glad to hear it. It functions as a component of the Electronic Spark Control system. It briefly retards spark timing.
@@MechanicLife that’s what I’ve been gathering and it was throwing me off. I was told by the original owner that the original 305 was replaced with a 350 which I never got to the bottom of but I’m assuming now the ESC was gutted. There are no signs of a smog pump ever existing, the vacuum lines to the EGR, and distributor advance were also plugged.
I also changed out the 305 to a 350 on this rig.
pretty sure I didn't hear anything about any vacuum that goes to the heater and air conditioning switch. Did I miss something? At what point did you mention that line. Just trying to re hook up my heater and I don't think I have vacuum to it
Hello! I have a 1984 Chevy G20 van. I have a corroded valve in the vacuum system and need to replace it to get proper seal. Doesn’t look like i can send a photo in these comments. I can’t seem to find a replacement part online anywhere, and i don’t know what it’s actually called. It is threaded into the intake plenum and has three ports: the one on the top is a metal line that goes down to the transmission. That is the only one that is intact. The other two ports are facing the passenger side. The upper port on the side is completely corroded off and connects to nothing. The lower port has been “repaired” poorly and connects to a split going to the front of the engine and the carbs TVS valve. For what it’s worth it’s right by the distributor. It’s got 3/8-inch npt threading. Do you know the name of this part so I can find a replacement?
Photos?
Luke u said u were going to finish with a video showing the cruise control and I have a 4 barrel carb and can’t figure out where the throttle return solenoid on the carb plugs in
I am redoing a 1984 chevy k5 Silverado blazer with a 305 4 barrel plz post a new video
www.73-87chevytrucks.com/techinfo/7387CKMans/Training/1968-1982_Cruisemaster_Cruise_Control.pdf
I dont have the other video up, but the link above should help.
1st Luke thanku soooo much for ur help so far .... I’m having a problem finding the vacuum line that goes to the throttle return solenoid ... I followed both videos and am now rewatching it but I don’t think u mentioned it .... bought a child on manual and it has it but never mentions or has vacuum diagrams .... any help would be appreciated
Do you have a video doing a 305 carburator vacuum lines 4 barrel
I don't.
1996 gm fule vacuum system
There's a vacuum pump of some kind (not the vaccum modulator) on the passanger side of the transmission i took it off a while back and have no clue as to how to put it back ...... transmission won't move the wheels until i put it back or so i was told so if anyone could shoot me a picture of that i would greatly appreciate at it...or let me know what it is( cause i have no clue) I'd greatly appreciate It. Transmission is a Turbo 350 automatic
Interested in this...here is a link. I thought vacuum modulator at first as well. Its on the passenger side near the rear of the transmission. Where is the location of the unit you removed in relation to what they have shown on this link? What year vehicle and make?
67-72chevytrucks.com/vboard/showthread.php?t=502579
Take a look at this photo and see if you can identify the part you took off, or the location that it was at.
www.hemmings.com/magazine/mus/2005/11/TH350-Transmission-Swap/1281614.html
Quick question
1. Did you service your transmission? If the fluid is low it won't hook up. I have done this a time or two;)
Got a 83 k5 needs allot of smog stuff they removed because they lived on arazona
Good Luck!
I have a vacuum reservoir on the driver side near firewall. The line from it is not currently connected and I don’t see the reservoir in the diagram. Where does it connect?
Year, make, model?
Lukes Garage 1985 Chev C-10 with 305 v-8
Check out this thread. 67-72chevytrucks.com/vboard/showthread.php?t=682969
@@MechanicLife if my vacuum is off my brake buster will my brake go down to the floor
Typically if you have that situation where the pedal goes to the floor your master cylinder is bad, you have a leak in your system or you have air in in the lines.
Is this the same! Diagram for a 1984 cutlass supreme as well?
very good video, well done. I am going to buy an electric car!!