1977 Mustang 302 Vacuum Hose Issues. Graphic Inside. - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 3 (permalink) Old 10-04-2007 Thread Starter
Rookie
Mustang II Member
 
Elwood's Avatar
 
Joined: Aug 2007
Location: Brooklyn
Posts: 32
 
1977 Mustang 302 Vacuum Hose Issues. Graphic Inside.

Hi Everyone -

First off, THANK YOU to everyone who helped -- especially since this is the classic forum (I think it's time to let the IIs into the classic party, no?).

I've done a lot detective work and have made the following diagram of how it is now.

Keep in mind that the car does indeed shift like doo doo - and it will be clear why when you see the diagram I made (click link).

1977 Mustang 302 Vacuum Hose Issues. Graphic Inside.-cobra_mustang_vacuum_diagram.gif

I think the root of this issue may be simple. Before I took the carb off, I made careful note where the tubes went. The yellow one to the base of the carb wouldn't come off so I disconnected it on the other end (mistake #1). While I have no recollection of disconnecting the Tranny hose, I must have due to the before-and-after shifting difference. I may have reconnected the yellow hose to where the tranny hose should go and then simply omitted rehookin the tranny hose out of memory lapse.

DOES ANYONE SEE A SOLUTION HERE? HOW IT 'SHOULD' BE?

Does anyone know what that small vacuum tree is that has one fitting to the EGR? Someone said it may be a switch. See photo.

Thanks to you all in advance.

Christian
Attached Thumbnails
Click image for larger version

Name:	smalltree_sloseup.jpg
Views:	2591
Size:	232.4 KB
ID:	34088   Click image for larger version

Name:	BklynCobra.jpg
Views:	4614
Size:	258.3 KB
ID:	34089  

Last edited by ScottHalliday; 10-05-2007 at 09:38 AM.
Elwood is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 10-04-2007
Made Member
Classic Member
5.0L Member
 
MizzouMike76's Avatar
 
Joined: Jul 2007
Location: PrishtinŽ, Kosova
Posts: 744
 
Send a message via Yahoo to MizzouMike76
Okay,

It shifts like poop and the metal line to the tranny is disconnected. There's the problem! There is a metal line between the vacuum modultor valve on the transmission and the vacuum source. In the case of my old '66, this is an intake vacuum source. I have since added power brakes, so the vacuum line was replaced with a vacuum fitting, with fittings for the PB booster and trans. modulator line. This metal transmission line needs to be hooked up to an intake vacuum source. I am looking at your diagram; is this small vacuum tree on the intake? If so, perhaps that is correct. However, I would lean towards using the tree that the PB booster uses.

Even a slight leak in the modulator line will cause shifting issues.

As for the heater valve, the vacuum for that is sourced from the heater controls inside the car. From the controls, there should be a vacuum source coming from inside the car to the engine, possibly on that small tree?

I think the grey line from the distributor should go to the carb. The yellow line from the carb to the booster lg tree doesn't seem right.

Oh, what a can 'o' worms!


To sum it all up: unhook yellow at lg tree and replace tranny line to lg tree. Hook dist to carb.

This is based on what I know about old cars, if I'm wrong I'm sure someone will let me know
Michael

1966 289-2V C-4 Convertible. 2nd owner, resurrected rustbucket. Factory console and power top, conversion to P/B with dual res MC.

1990 GT 25th Anniversary 5.0 AOD Convertible. SOLD
MizzouMike76 is offline  
post #3 of 3 (permalink) Old 10-04-2007
Made Member
Classic Member
5.0L Member
 
MizzouMike76's Avatar
 
Joined: Jul 2007
Location: PrishtinŽ, Kosova
Posts: 744
 
Send a message via Yahoo to MizzouMike76
Oh, and I think that II of yours is a wicked sweet ride.

And yes, she's a classic!

1966 289-2V C-4 Convertible. 2nd owner, resurrected rustbucket. Factory console and power top, conversion to P/B with dual res MC.

1990 GT 25th Anniversary 5.0 AOD Convertible. SOLD
MizzouMike76 is offline  
Sponsored Links
Advertisement
 
Closed Thread

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in









Random Question

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183