Vacuum Hose 1973 Mustang 302 Distributor Advance, Auto Trans Modulator, EGR
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- čas přidán 20. 09. 2020
- In this video a 1973 Mustang with a 302 V-8 and automatic transmission is used to show how the distributor vacuum advance, EGR, and automatic transmission modulator are routed from within the engine compartment near the carburetor. The same Mustang with a 302 and manual transmission differs in a few ways. First, the vacuum advance diaphragm is a dual diaphragm design. And, it turns out in the auto tranny calibration a single ported outlet from the carburetor is used for the EGR, tranny modulator, and distributor vacuum advance actuating. For the manual tranny the carb has two separate ports, one for the EGR and the "back side" of the vacuum advance canister on the distributor, and one for the distributor vacuum advance diaphragm's main connection.
Following is a link relating to 1973 Mustang 302 engines with automatic transmissions showing vacuum system diagrams, and where the emission control systems can be altered IF anyone were to want to do so (not recommended):
drive.google.com/file/d/1MMCK...
Here are some related videos on the topic of transmission vacuum modulators:
• 1973 Mustang Ported An...
• 1973Mustang Vacuum Tes...
• 1973 Mustang Auto Tran... - Krátké a kreslené filmy
That's knowledge, thanks, you, sir for the details rare info.
Thank you for the comment. It is always nice to know others have benefitted from the videos Lynda and I have published... It is something we really enjoy doing. That others find the info useful is icing on the cake.
The back diaphragm hookup cleans out your distributor that is the way it is on mine I have a 1971truck 302
O yeah my truck has 3 on on the tree
thank you for this video. My Mustang 1970 automatic transmission works nicely again.
I am glad I was able to help.
love for you to look at my 1968 Mercury Montego MX
You can DM me via Facebook. Gilbert M Hale from Pittsford (Rochester), NY.
facebook.com/profile.php?id=1300222433&sk=about
There are several Boykin Sean profiles in Facebook, and I could not see which was your profile. When you get a moment from within Facebook please Direct Message (DM) me so I can see the Montego. In the profiles in Facebook none of the Boykin Sean profiles I saw had any Montego photos. I happen to like Mercury Montegos, by the way.
Thank you.
Ah, I just found a DM you tried to send to me within Facebook. But I am told I am not allowed to see your profile as it is restricted. You can email me with attached photos at gilhale@gmail.com as an alternative, if you would like.
Hi Gilbert. Could you please let me know how does the Vacuum Sensor inside the airbox it's positioned and to which pin the hose underneath connects to? There's two pins. I did an Air Box replacement and switched all components over. Inside the sensor (view opening) both side seems to be in an open position. I do appreciate your time, even if you post a picture of underneath would help! Thanks
If I am reading your description you are speaking of the duel ported thermal sensor that sits on the underside of the air filter housing. One of its ports goes directly to intake manifold vacuum off the vacuum tee behind the carburetor. The other goes to the vacuum motor for the air filter inlet to help direct air coming either from the end of of the air snorkel, or from air being passed over the exhaust manifold to get heated air into the air filter when the engine is warm. .I will see if I can get a more clear photo or diagram to you so you can see what it is I am trying to describe better. Our 73 Mustang Convertible with it 302 has that particular configuration. Once I find photos or diagrams I will post them onto CZcams, and send you the link for the CZcams site as a reply in this thread.
I put together a PDF snippet of the Air Inlet Control System, to include vacuum hose routings. I am not able to place the PDF file onto CZcams, nor can I attach it to this CZcams comment thread. If you email a request for the "1973 Mustang Air Inlet control System PDF file" I will send it to you via eMail attachment Although this is a 1973 configuration, it is a configuration used over several years with no significant change. My email is gilhale@gmail.com.
@@gilberthale7777 Thank you so much buddy! I did actually figure it out. There were a hose missing from the thermal sensor. Going through all the trouble since I added Ram Air to the stock housing.
@@gilberthale7777 Ok sounds great. I will follow up with an email soon just to confirm the set up. Gilbert, you are the best and thanks again from taking the time to reply and everything that you do for others. Your videos are very interesting and knowledgeable.
@@ajs.m929 I converted the 2 most important pages from the PDF file into two jpg files, then merged the jpg files into a short video clip. Just pause the video when you see content of interest. czcams.com/video/WqYYIkkxh_8/video.html
Hello sir, i am currently removing all this emission crap & leaving the vac advance to the distributor & one for the transmission diaphragm. Hopefully it runs ok. I have heard it is cammed in a way to account for emissions, so i guess i need to re-time & reset some stuff. Has anyone taken it all of & capped the ports?
Greetings! I know I have seen quite a few cars where folks have just pulled all the various vacuum hoses, likely out of frustration and perhaps also in the belief they would improve things. I am not a purist for the sake of being a purist. But, for the most part the various vacuum related engine components really did not harm performance unto themselves. In fact some of the systems are beneficial in a few different ways. In 1973 the engines were indeed modified to further reduce NOx emissions by using less combustion chamber compression, increasing combustion chamber quench surface area, adding an EGR system, and retarding the valve timing a little bit. It is possible to reduce the number of vacuum lines to the most basic distributor vacuum advance diaphragm hose, and the automatic transmission vacuum modulator valve. But, in cases where the vacuum advance diaphragm have a dual port design, you really should replace those dual diaphragm design units with their single diaphragm design from 1971 or 1972.
That said, I would be leaving the 3 port Thermal Vacuuum Switch in place as it replaced ported vacuum with intake manifold vacuum when the engine temperzture hit 235 degrees or so, in an effort to help cool the engine off. And, there areva few different flavors of single vacuum diaphragm Auto Transmission Vacuum Modulator valves, with different color stripes on the outside of the units to indicate the specific design of any particular unit. I have found the Green Stripe Vacuum Modulators work best overall. But with any kind of modification, YMMV,.
If you would like I would be glad to look at your engine's vacuum calibration and let you know which vacuum hoses and devices I would be keeping, and which ones can be safely bypassed. Just reply to my post and I will read it, and provide more help where I can. Please rovide the year engine, size engine, and a photo of the white label calibration code info from the passenger side valve cover (if it is there). Some photos of the current vacuum lines with the engine might be helpful also. You can sent the photos to my email @ gilhale@gmail.com.
@@gilberthale7777 thank-you for the detailed reply!! I will get in touch soon.
Mine is a 1973 Ford Maverick 302 auto
@@imagoflyfishing9993 Okay, I will do some preliminary
digging
I enhanced the 302 Vacuum Schematics for 3-11A & 3-11D for 302 2v engines and auto tranny for the Maverick (and other) model vehicles. You can retrieve it using the following link to my Google Drive:
drive.google.com/file/d/1MMCKqJOygplF1JtKi1O_C60Bqi1B6Sy5/view?usp=drive_link
@@gilberthale7777 thank-you so much!!! This is pretty much everything!! I cannot describe the amount of thanks for this!!!