Need some help tracking a diagram down

Reply Subscribe

Thread Tools

Search this Thread

Apr 10, 2010 | 11:35 PM

physicsguy11

Thread Starter

Junior User

Joined: Oct 2009

Posts: 56

Likes: 0

Need some help tracking a diagram down

I am trying to figure out my vacuum diagram in an effort to fix up my vacuum lines. I dont know what all the different components are (couldn't point to half of them under the hood), and I also dont know how much the PO has messed with things. I have a picture of the vacuum diagram from under the hood:

http://i8.photobucket.com/albums/a8/...n/DSC_0256.jpg

I think that
VDV = Vacuum delay valve
VRDV = vacuum retard delay valve
TVS = thermal vacuum switch
Air BPV = Air bypass valve
A/CL BIMET = air cleaner bimetallic sensor
A/CL DV = air cleaner duct and valve vacuum motor (?)
VCV = vacuum control valve
TVV = thermal vent valve
EGR = exhaust gas recirculator
Dual DV = dual delay valve
VREST = vacuum restrictor
Purge CV = Purge Control valve
Sec CAN = secondary canister
not sure about the others on the diagram...

In trying to figure all this out, I found this diagram on one of the threads in this forum:

http://i649.photobucket.com/albums/u...0/7-72-R11.jpg
This looks like it could really help if I could find the right one. What diagram is this exactly? Does anyone know where I can get a diagram like this for my truck? I have a 79 F150, 351M (supposedly).

In case anyone is interested, here is the other emissions label under the hood.

http://i8.photobucket.com/albums/a8/...n/DSC_0257.jpg

Apr 11, 2010 | 09:28 AM

Jermafenser

Postmaster

Joined: Jul 2001

Posts: 4,956

Likes: 10

From: MD

The diagram under your hood is the diagram to follow, not the one you found on here as that is for earlier years.

LCV = Load Control Valve

On the carb:

S = spark port
E = ev/em port
BV = bowl vent
V = venturi port

FUEL T = fuel tank
Carb SPCR = carburetor spacer

Apr 12, 2010 | 12:24 AM

physicsguy11

Thread Starter

Junior User

Joined: Oct 2009

Posts: 56

Likes: 0

Thanks for the info Jerma. I do have an Edelbrock carb and manifold: If these ports are not present on these parts, can I just cap off the feed lines that would have gone to the S, E, BV, and V ports and carb spacer?

I figured that I would need a diagram specific to my year. I was wondering if anyone knew where I could get the right one. Is it in the shop manual?

Apr 12, 2010 | 09:27 AM

Jermafenser

Postmaster

Joined: Jul 2001

Posts: 4,956

Likes: 10

From: MD

The ports are on the carburetor itself, so you don't have to worry about that.

I just told you! You have the diagram, it's the one you took a picture of under your hood!