Small Vacuum Line in an 88

Hey I had a post a while back about my small vacuum lines on my 88 351 Bronco, I have fixed all my vacuum lines except a small tan line (not the yellow one) that comes off the vacuum tree and goes behind the throttle body and comes out over the passenger side valve cover and that is where it is broken off at. I cannot find where the line is supposed to go to fix it Any help would be great Thanks.

yo J!

LTNS Pal,

I don't see a TAN color anywhere; according to mucho info posted by

by our PAL SEABRONC & Steve83 (includes Carbureted Models)

Any chance it is a discolored Pink?

Vacuum Diagram Color Codes:

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 = TAD to Thermactor Air Bypass Valve (TAB or AIR BPV) /AIR Bypass (AIRB) valve

NOTE: AIR BPV is the AIR Bypass (AIRB) Valve; also called the TAB (Thermactor Air Bypass) Valve in other years/diagrams

 

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Here is a vac diagram for your year and 5.8 (took first cal # as example);

http://www.motorcraftservice.com/pubs/auxf/~WC/USENIE/1858/E8AEAGA.gif'>http://www.motorcraftservice.com/pubs/auxf/~WC/USENIE/1858/E8AEAGA.gif

 

From TOP of Diagram at NOON position;

 

ACV (Air Control Valve) is the TAD (Thermactor Air Diverter) Valve (AIR Bypass (AIRB) and AIR Diverter (AIRD) valve combinations)

 

MAN VAC is Manifold Vacuum

FPR is Fuel Pressure Regulator

EGR is Exhaust Gas Re-circulation Valve

 

SOL V:

Thermactor Air Diverter (TAD) Solenoid (SOL V) (AIRD) see http://www.broncolinks.com/index.php?index=905

Thermactor Air Bypass (TAB) Solenoid see http://www.broncolinks.com/index.php?index=904

 

EVR is EGR Vacuum Regulator

 

VRESER is the Vacuum Reservoir Can (Tank); Location pic in an 89 5.0 (Adam Titled it as "This")

by AdamDude04 & miesk5 at http://broncozone.com/topic/19892-whats-this-hose/

 

V REST on later years is Vapor Valve (Roll-Over); Depictions & Location Diagrams in 5.0, 5.8, 7.5, & 4.9; "...All fuel tank vapor valves make use of a small orifice that tends to allow only vapor and not fuel to pass into the line running forward to the vapor storage canister. This assembly mounts directly to the fuel tank using a rubber seal. Fuel vapors trapped in the sealed fuel tank are vented through the orificed vapor valve assembly in the top of the tank. The vapors leave the valve assembly through a single vapor line and continue to the carbon canister for storage, until they are purged to the engine. The vapor valve assembly mounted on the top of the fuel tank is used to control the flow of fuel vapor entering the fuel tank vapor delivery line which conducts vapor forward to the canister in normal circumstances. If due to extreme conditions, excessive pressure is generated inside the tank, the purge port opens up, allowing fuel vapor to escape to the atmosphere, and stabilizes pressure inside the tank. The valve assembly has a head valve which prevents the fuel tank from overfilling during refueling operation. The valve assembly also has a spring supported float assembly, which prevents liquid fuel from entering the vapor delivery line during severe handling, steep grades or in the event of vehicle rollover. The fuel fill cap is sealed and includes a built-in pressure-vacuum relief valve. Fuel system vacuum relief is provided after 3.5 kPa (0.50 psi) and pressure relief after 11.0 kPa (1.6 psi). Under normal operating conditions, the fill cap operates as a check valve, allowing air to enter the tank as fuel is used, while preventing vapors from escaping the tank through the cap..." by Ford via Steve83 at http://www.supermotors.net/registry/media/283481

 

(not shown but...) Vapor Valve (V REST) pics in 5.0, 5.8, & 4.9...The smaller valve uses a thicker grommet to fit in the same hole as the larger one..." by Ford via Steve at http://www.supermotors.net/registry/media/767956

 

Carbon Can is da Carbon Canister (Charcoal Canister, Vapor Canister, Evaporative Emission (EVAP) Canister)

 

MAP is da Manifold Absolute Pressure Sensor

 

AIR BPV is the AIR Bypass (AIRB) Valve; also called the TAB (Thermactor Air Bypass) Valve

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This is a pic of 90's Lines by Seattle Bronco;



The Pink Vacuum Line goes from the TAB Solenoid (driver's side rear solenoid) to the passenger side (adjacent to the Vacuum Reservoir Can) and down to the bottom of the TAB (Bypass) Valve. Note that my Pink Vacuum line appears Yellowish in this pic and is not yet connected to the base of the TAB Valve as I was working up a solution at the time.

Here is a pic of my VECI (Vehicle Emissions Control Information) Label for a 1990 5.8L Bronco. Be advised that the ACV (Air Control Valve) is the TAD (Thermactor Air Diverter) Valve and the AIR BPV is the TAB (Thermactor Air Bypass) Valve. The VRESER is the Vacuum Reservoir Can where the red & black vacuum lines plug into and the EGR is actually the EVP (EGR Valve Position Sensor



His COLOR CODED diagram is about = to your Year!

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other stuff not in your year

 

CPRV is Canister Purge Solenoid Valve/ Canister Purge Solenoid (CANP) is controlled by the PCM to vent fumes from the charcoal canister to intake manifold only when the engine is running; pic in a 90 by Seattle Bronco at http://www.supermoto...ry/media/795183

 

V REST on earlier years such as SEABRONC's 83 is a Vacuum Restictor/delay valve, it delays vacuum for a certain amount of time. See his Vacuum Line Diagram (modified to reflect changes He made) at http://www.supermoto.../media/672883_1

 

VCKV is Vacuum Check Valve

 

CAT is the catalytic converter

 

ENG is the engine

 

PCV is Positive Crankcase Ventilation Valve

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Vehicle Emission Control Information (VECI) Decal,

for 88 & UP.

On-Line for Free at Ford.

Click "Quick Guides" in left panel;

Scroll to & CLICK VECI Labels "Provides Vehicle Emission Control Information (VECI) and a related calibration parts list." Enter applicable info (need to know your Calibration number from your B-pillar sticker).

Vacuum Diagram is the same as the one on the core support or hood or air filter cover.

Source: by Ford http://www.motorcraftservice.com

Here is one since I dont know your CAL #

http://www.motorcraftservice.com/pubs/auxf/~WC/USENIE/1858/E8AEAGA.gif



 

This should be same as your yr; if not, then process is same; these lines are avail at most NAPA etc or on-line

Silicone Vacuum Tubing @ http://www.forgemotorsport.com/content.asp?inc=product&catalog=0022VT

Mini-Tube Vacuum Hose Service in Climate Control System in a 96;

"...Measure the length of the damaged area of the mini-tube vacuum hose. Cut a piece of standard 3mm (1/8-inch) ID vacuum hose approximately 25mm (1 inch) longer than the damaged area of the mini-tube vacuum hose. Cut the mini-tube vacuum hose on each side of the damaged area and remove damaged portion of the mini-tube vacuum hose. Dip the mini-tube hose ends in Tetra Hydro Furan (THF) or Methyl Ethyl Ketone (MEK). Either of these solvents will act as a sealer for the repair of the mini-tube vacuum hose. Insert the ends of the mini-tube vacuum hose approximately 9mm (3/8 inch) into the ends of the standard 3 mm (1/8-inch) ID replacement vacuum hose. Shake the service joint after assembly to make sure solvent is dispersed and vacuum line is not blocked internally. Test system for a vacuum leak in area serviced..." from 1996 F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual

EDIT; see Below

YO,

I couldn't find my reply here at all; I searched for hours!

Tan is prob.:

Yellow = from the TAD Solenoid (driver's side Forward Solenoid) to the TAD (Diverter) Valve located at the rear of the Intake Manifold (Distributor Advance in Carbureted Engines);

& to summarize from this thread & one of our other discussions here;

Color Codes (EFI Engines):

Red = Main vacuum;

Green = EGR function;

Orange = Heat control Valve (exhaust & intake), AKA heat riser but more complex);

Yellow = from the TAD Solenoid (driver's side Forward Solenoid) to the TAD (Diverter) Valve located at the rear of the Intake Manifold (Distributor Advance in Carbureted Engines);

White = EGR vacuum (source);

Black = Thermactor ACV or Diverter valve;

Pink = from the TAB Solenoid (driver's side rear solenoid) to the bottom of the Thermactor Air Bypass Valve (TAB or BPV/AIR Bypass (AIRB) valve);

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Color Codes (EFI Engines, Late Model Years) By Ford via Steve83:

Black = Vacuum Reservoir Can (Tank) (VRESER) to TAD & TAB

Red = Main vacuum from Intake Manifold to Vacuum Reservoir Can (Tank) (VRESER)

Yellow = from TAD to Combined Bypass and Diverter Valve. located at the rear of the Intake Manifold

Pink = from TAB to Combined Bypass and Diverter Valve (see Seattle FSB info below)

==========

"...The Pink Vacuum Line goes from the TAB Solenoid (driver's side rear solenoid) to the passenger side (adjacent to the Vacuum Reservoir Can) and down to the bottom of the TAB (Bypass) Valve. Note that my Pink Vacuum line appears Yellowish in this pic and is not yet connected to the base of the TAB Valve as I was working up a solution at the time.,," by Seattle FSB (SeattleFSB)

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Color Codes by our PAL SEABRONC! (Some are in an 83 & probably Carbureted Engines):

Red = Main vacuum from Intake Manifold to Coffee can

Green = EGR function

Orange = Heat control Valve (exhaust & intake), AKA heat riser but more complex in Carbureted Engine Broncos/trucks

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)

======================

Vacuum Line Acronyms:

TAB is the Thermactor Air Bypass Solenoid

TAD is the Thermactor Air Diverter Solenoid

ACV (Air Control Valve) is the TAD (Thermactor Air Diverter) Valve (AIR Bypass (AIRB) and AIR Diverter (AIRD) valve combinations);

MAN VAC is Manifold Vacuum;

FPR is Fuel Pressure Regulator;

EGR is Exhaust Gas Re-circulation Valve

SOL V: Thermactor Air Diverter (TAD) Solenoid (SOL V) (AIRD) & Thermactor Air Bypass (TAB) Solenoid;

EVR is EGR Vacuum Regulator;

VRESER is the Vacuum Reservoir Can (Tank);

V REST on later years is Vapor Valve (Roll-Over);

V REST on earlier years such as SEABRONC's 83 is a Vacuum Restictor/delay valve, it delays vacuum for a certain amount of time;

Carbon Can is Carbon Canister (Charcoal Canister, Vapor Canister, Evaporative Emission (EVAP) Canister);

MAP is Manifold Absolute Pressure Sensor;

AIR BPV is the AIR Bypass (AIRB) Valve, also called the TAB (Thermactor Air Bypass) Valve;

CPRV is Canister Purge Solenoid Valve/ Canister Purge Solenoid (CANP);

VCKV is Vacuum Check Valve; CAT is catalytic converter;

ENG is engine;

PCV is Positive Crankcase Ventilation Valve

MAN VAC is Manifold Vacuum

CAT is the catalytic converter

ENG is the engine

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more by our PAL SEABRONC & Steve83 (includes Carbureted Models)

SV CBV = Carbureter Fuel Bowl Solenoid Vent Valve

LCV = EGR Load Control

WOT = Wide Open Throttle) Valve

HICV = Hot Idle Control Valve

IVV = Thermactor Idle Vacuum Valve

VRDV = Vacuum Delay Valve (VDV, VRDV, DV-TW)

VDV = Vacuum Delay Valve)

VRDV = Distributor ****** Delay Valve

DV-TW = Two Way Delay Valve)

HEAT VLV INT = Heat Vacuum Control Valve Intake, (next to carb)

======================

by AsianSpanker

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

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: Vacuum

VCKV: Vacuum Check Valve

VRESER: Vacuum Reservoir Solenoid Valve it is the vacuum resevoir

V CK V: Vacuum Check Valve

VRDV: Distributor ****** Delay Valve

TVS: Throttle Valve Solenoid (aka Solepot, Dashpot)

TVV: Thermostatic Vacuum Valve (aka Ported Vacuum Switches)

PURGE CV: Vapor Canister Purge Valve

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