FAQ - Vacuum Diagram Acronyms
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FAQ - Vacuum Diagram Acronyms
I have had such a hard time figuring out my vacuum hose routing and what each thing does I thought I would post what I have so far. I have a 1981 F-100 with a 302 2 BBL. I found about 30 different ways this engine has the hoses routed in the Library. And everything is in Acronyms.
VACUUM DIAGRAM ACRONYMS
So this is what it took me two days to come up with. What a VRV is? What an EFCA is? Still searching. But I have grown to hate acronyms because they can be for many things. Some sound like the same ball park. How would you like to go in and order an LSD (Limited Slip Differential) and get an sugar cube full of drugs? Why it can't be spelled out is beyond me.
A/CL: Located in the air cleaner
A/CL DV: Air Cleaner Diverter Valve
A/CL BI MET: Air Cleaner Bi-Metallic Valve
A/CL CWM: Air Cleaner Cold Weather Modulator
ACV: Air Control Valve
AIR: Ford calls this the Thermactor, short for Thermal Reactor. CA vehicles are installed with it as standard. Air Injection Reaction is what it stands for.
AIR BPV: Air Bypass Valve (aka Thermactor Air Bypass TAB)
BV: Bowl Vent (on top of the float tanks)
CARB: Carburetor
CPRV: Canister Purge Valve
DIST: Distributor
EGR: Exhaust Gas Recirculator
EFCA: Electronic Fuel Control Assymbly
FLTR: Filter
FPR: Fuel Pressure Regulator
IVV: Thermactor Idle Vacuum Valve
MAN VAC: Indicating Manifold vacuum-Vacuum source
MAP: Manifold Absolute Pressure
PVS: Ported Vacuum Switch
SOLV: Solenoid Valve
SV-CBV: Carburetor Fuel Bowl Solenoid Vent Valve
VAC: Vacuum
VCKV: Vacuum Check Valve
VRESER: Vacuum Reservoir
VREST: Vacuum Restrictor
VREST: Vacuum Restrictor
VRV: Vacuum Regulator Valve
V CK V: Vacuum Check Valve
VRDV: Vacuum Retard Delay Valve
TVS: Thermal Vacuum Switch
TVV: Thermal Vent Valve
PURGE CV: Vapor Canister Purge Valve
Color Codes to do Vacuum Diagram
Red = Main vacuum
Green = EGR function
Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex)
Yellow = Distributor advance
White = EGR vacuum (source)
Black = Mainly used for the Evaporative emissions control
Black = Thermactor ACV or Diverter valve
Blue = Throttle Kicker control
Pink = Thermactor Air Bypass Valve (BPV)
Green = EGR function
Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex)
Yellow = Distributor advance
White = EGR vacuum (source)
Black = Mainly used for the Evaporative emissions control
Black = Thermactor ACV or Diverter valve
Blue = Throttle Kicker control
Pink = Thermactor Air Bypass Valve (BPV)
So this is what it took me two days to come up with. What a VRV is? What an EFCA is? Still searching. But I have grown to hate acronyms because they can be for many things. Some sound like the same ball park. How would you like to go in and order an LSD (Limited Slip Differential) and get an sugar cube full of drugs? Why it can't be spelled out is beyond me.
Last edited by ctubutis; Jul 9, 2012 at 11:17 AM. Reason: Added vrest, VRV, VAC, EFCA, PVS
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From: Virginia
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I once had a problem with my Plymouth van - the speedo stopped working and the engine would stall whenever I came to a stop.
The mechanic said,"Oh, yea, that's a bad DSS."
I asked, "What is a DSS?"
He said, "Speed Distance Sensor".
I said, "Don't you mean Distance Speed Sensor, as in DSS?"
He said, "No, it's a Speed Distance Sensor, or DSS for short."
You have to love mechanics.
The mechanic said,"Oh, yea, that's a bad DSS."
I asked, "What is a DSS?"
He said, "Speed Distance Sensor".
I said, "Don't you mean Distance Speed Sensor, as in DSS?"
He said, "No, it's a Speed Distance Sensor, or DSS for short."
You have to love mechanics.
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Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
I once had a problem with my Plymouth van - the speedo stopped working and the engine would stall whenever I came to a stop.
The mechanic said,"Oh, yea, that's a bad DSS."
I asked, "What is a DSS?"
He said, "Speed Distance Sensor".
I said, "Don't you mean Distance Speed Sensor, as in DSS?"
He said, "No, it's a Speed Distance Sensor, or DSS for short."
You have to love mechanics.
It's VSS Vehicle speed sensor, You need a new mechanic
The mechanic said,"Oh, yea, that's a bad DSS."
I asked, "What is a DSS?"
He said, "Speed Distance Sensor".
I said, "Don't you mean Distance Speed Sensor, as in DSS?"
He said, "No, it's a Speed Distance Sensor, or DSS for short."
You have to love mechanics.
It's VSS Vehicle speed sensor, You need a new mechanic
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From: Virginia
Yes. Go up to "galleries" and click on "Manage/Create". Create a gallery and it will let you upload GIF and JPG's. You can then get links and put them in your posts.
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Answer to Question: money
I have had such a hard time figuring out my vacuum hose routing and what each thing does I thought I would post what I have so far. I have a 1981 F-100 with a 302 2 BBL. I found about 30 different ways this engine has the hoses routed in the Library. And everything is in Acronyms.
VACUUM DIAGRAM ACRONYMS
So this is what it took me two days to come up with. What a VRV is? What an EFCA is? Still searching. But I have grown to hate acronyms because they can be for many things. Some sound like the same ball park. How would you like to go in and order an LSD (Limited Slip Differential) and get an sugar cube full of drugs? Why it can't be spelled out is beyond me.
A/CL: Located in the air cleaner
A/CL DV: Air Cleaner Diverter Valve
A/CL BI MET: Air Cleaner Bi-Metallic Valve
A/CL CWM: Air Cleaner Cold Weather Modulator
ACV: Air Control Valve
AIR: Ford calls this the Thermactor, short for Thermal Reactor. CA vehicles are installed with it as standard. Air Injection Reaction is what it stands for.
AIR BPV: Air Bypass Valve (aka Thermactor Air Bypass TAB)
BV: Bowl Vent (on top of the float tanks)
CARB: Carburetor
CPRV: Canister Purge Valve
DIST:
EGR: Exhaust Gas Recirculator
EFCA:
FLTR: Filter
FPR: Fuel Pressure Regulator
IVV: Thermactor Idle Vacuum Valve
MAN VAC: Indicating Manifold vacuum-Vacuum source
MAP: Manifold Absolute Pressure
SOLV: Solenoid Valve
SV-CBV: Carburetor Fuel Bowl Solenoid Vent Valve
VAC:
VCKV: Vacuum Check Valve
VRESER: Vacuum Reservoir Solenoid Valve
VRV:
V CK V: Vacuum Check Valve
VRDV: Distributor Retard Delay Valve
TVS: Throttle Valve Solenoid (aka Solepot, Dashpot)
TVV: Thermostatic Vacuum Valve (aka Ported Vacuum Switches)
PURGE CV: Vapor Canister Purge Valve
A/CL DV: Air Cleaner Diverter Valve
A/CL BI MET: Air Cleaner Bi-Metallic Valve
A/CL CWM: Air Cleaner Cold Weather Modulator
ACV: Air Control Valve
AIR: Ford calls this the Thermactor, short for Thermal Reactor. CA vehicles are installed with it as standard. Air Injection Reaction is what it stands for.
AIR BPV: Air Bypass Valve (aka Thermactor Air Bypass TAB)
BV: Bowl Vent (on top of the float tanks)
CARB: Carburetor
CPRV: Canister Purge Valve
DIST:
EGR: Exhaust Gas Recirculator
EFCA:
FLTR: Filter
FPR: Fuel Pressure Regulator
IVV: Thermactor Idle Vacuum Valve
MAN VAC: Indicating Manifold vacuum-Vacuum source
MAP: Manifold Absolute Pressure
SOLV: Solenoid Valve
SV-CBV: Carburetor Fuel Bowl Solenoid Vent Valve
VAC:
VCKV: Vacuum Check Valve
VRESER: Vacuum Reservoir Solenoid Valve
VRV:
V CK V: Vacuum Check Valve
VRDV: Distributor Retard Delay Valve
TVS: Throttle Valve Solenoid (aka Solepot, Dashpot)
TVV: Thermostatic Vacuum Valve (aka Ported Vacuum Switches)
PURGE CV: Vapor Canister Purge Valve
Color Codes to do Vacuum Diagram
Red = Main vacuum
Green = EGR function
Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex)
Yellow = Distributor advance
White = EGR vacuum (source)
Black = Mainly used for the Evaporative emissions control
Black = Thermactor ACV or Diverter valve
Blue = Throttle Kicker control
Pink = Thermactor Air Bypass Valve (BPV)
Red = Main vacuum
Green = EGR function
Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex)
Yellow = Distributor advance
White = EGR vacuum (source)
Black = Mainly used for the Evaporative emissions control
Black = Thermactor ACV or Diverter valve
Blue = Throttle Kicker control
Pink = Thermactor Air Bypass Valve (BPV)
So this is what it took me two days to come up with. What a VRV is? What an EFCA is? Still searching. But I have grown to hate acronyms because they can be for many things. Some sound like the same ball park. How would you like to go in and order an LSD (Limited Slip Differential) and get an sugar cube full of drugs? Why it can't be spelled out is beyond me.
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Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
I have had such a hard time figuring out my vacuum hose routing and what each thing does I thought I would post what I have so far. I have a 1981 F-100 with a 302 2 BBL. I found about 30 different ways this engine has the hoses routed in the Library. And everything is in Acronyms.
VACUUM DIAGRAM ACRONYMS
A/CL: Located in the air cleaner
Actually according to Ford, that IS the air cleaner.
A/CL DV: Air Cleaner Diverter Valve
A/CL BI MET: Air Cleaner Bi-Metallic Valve
A/CL CWM: Air Cleaner Cold Weather Modulator
ACV: Air Control Valve
AIR: Ford calls this the Thermactor, short for Thermal Reactor. CA vehicles are installed with it as standard. Air Injection Reaction is what it stands for.
AIR BPV: Air Bypass Valve (aka Thermactor Air Bypass TAB)
BV: Bowl Vent (on top of the float tanks)
CARB: Carburetor
CPRV: Canister Purge Valve
BV: Bowl Vent (on top of the float tanks)
CARB: Carburetor
CPRV: Canister Purge Valve
DIST:
EGR: Exhaust Gas Recirculator
EFCA:
FLTR: Filter
FPR: Fuel Pressure Regulator
IVV: Thermactor Idle Vacuum Valve
MAN VAC: Indicating Manifold vacuum-Vacuum source
MAP: Manifold Absolute Pressure
SOL V: Solenoid Valve
SV-CBV: Carburetor Fuel Bowl Solenoid Vent Valve
VAC:
VCKV: Vacuum Check Valve
VRESER: Vacuum Reservoir Solenoid Valve
VRV:
V CK V: Vacuum Check Valve
VRDV: Distributor Retard Delay Valve
TVS: Throttle Valve Solenoid (aka Solepot, Dashpot)
TVV: Thermostatic Vacuum Valve (aka Ported Vacuum Switches)
PVS: Ported Vacuum Switch: Very simular to TVVs except on Fords they are used in the cooling system and are controlled by water temps.
PURGE CV: Vapor Canister Purge Valve
Color Codes to do Vacuum Diagram
Red = Main vacuum
Green = EGR function
Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex)
Yellow = Distributor advance
White = EGR vacuum (source)
Black = Mainly used for the Evaporative emissions control
Black = Thermactor ACV or Diverter valve
Blue = Throttle Kicker control
Pink = Thermactor Air Bypass Valve (BPV)
Red = Main vacuum
Green = EGR function
Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex)
Yellow = Distributor advance
White = EGR vacuum (source)
Black = Mainly used for the Evaporative emissions control
Black = Thermactor ACV or Diverter valve
Blue = Throttle Kicker control
Pink = Thermactor Air Bypass Valve (BPV)
Like on my 1981 300-6...
RED: Manifold Vacuum
Yellow: Vacuum Advance
Blue: EGR Function, main source vacuum before PVS.
Green: EGR Function Primary function after PVS.
White: Wide Open Throttle sensor
Pink: Thermactor Control Solenoids main source after TVS.
Pink/Green: TAB Valve
Pink/Blue: TAD Valve
Etc.... To list all my vacuum lines would write a small book.
My point is, Ford had it's own variations of these terms. They are listed in the shop manuals though...
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
There are multiple colors of vacuum restrictors and they are color coded depending on size and how much vacuum is restricted.
My truck has two.
One blue between the WOT vacuum switch and the vacuum source.
One Orange between the distributor vacuum advance and the Spark Retard solenoid.
My truck has two.
One blue between the WOT vacuum switch and the vacuum source.
One Orange between the distributor vacuum advance and the Spark Retard solenoid.