yo, Comcast began to freeze me out again so I have to enter info & post before I lose it all
Location pic in a 90 5.8; "...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; On my 1990 ex-5.8L, the Yellow Vacuum Line goes from the TAD Solenoid (driver's side forward solenoid) to the TAD (Diverter) Valve located at the rear of the Intake Manifold. You have to climb up onto the engine to feel the Diverter Valve or remove the Intake Manifold. I'd rather climb up using plans, ala a scaffolding type set-up; maybe remove hood depending on circumstances such as me now, w/ backache..."
Source: by Seattle FSB (SeattleFSB)
http://www.supermotors.net/registry/media/848247
Vacuum Lines pic in a 90 5.8; TAB/V, EGR, VAC, EVR, TAD/S, TAB/S, TAD/V & VRESER(Vacuum Reservoir/Tank); "...took all of my vacuum lines off just to show you how the EVR Solenoid connects at the top right, goes around the back of the engine and then to the EGR. The TAB, TAD and EVR Solenoids have a common vacuum line. Then the other side of each solenoid goes to the Thermactor Air Bypass (TAB), Thermactor Air Diverter (TAD) and EGR respectively..."
Source: by SeattleFSB (Seattle FSB)
Vacuum Line Acronyms & Color Codes; EMISSION: 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 = Mainly used for the Evaporative emissions control; Black = Thermactor ACV or Diverter valve; Blue = Throttle Kicker control; 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); 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 @ Gas tank); V REST on earlier years such as 78/79 & SEABRONC's 83 is a Vacuum Restictor/Delay Valve, it restricts vacuum for a certain amount of time, on most engines a vacuum line from the carburetor base runs to a T & then to V REST to the distributor; 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; vacuum check valve blocks airflow in one direction and frees airflow in the other direction. The check side of this valve will hold the highest vacuum seen on the vacuum side. If not, replace it. CAT is catalytic converter; ENG is engine; PCV is Positive Crankcase Ventilation Valve. HVAC in 92-96; Black = from engine source to vacuum check valve & to vacuum reservoir tank & to Control Panel; White = actuates the Outside/Recirc air door two-position vacuum control motor; Blue = Mix (actuates the FLOOR/PANEL air door two-position vacuum control motor); Red = Floor Flow & Yellow = Panel, (actuate the FLOOR/DEFROST three-position air vacuum control motor). READ MORE
Source: by Seabronc (Rosie, Fred W), Seattle FSB & miesk5 at Ford Bronco Zone Forums
http://broncozone.com/topic/20593-small-vacuum-line/
More by Seattle for example;
such as;
1990 Bronco EVTM; such as;
http://www.supermotors.net/registry/20487/76450