1984 Bronco Vacuum line help

[Buckstalker17]

Just bought a 1984 bronco 4x4 with a 351 Windsor. The price was killer so I didn't care about the condition of the motor. The people who owned it did a lot of BS mickey mousing with the vacuum lines and electrical. IE cutting and leaving some wide open, or cutting and plugging with screws. needless to say it is running very lean and the headers begin to glow after a few minutes of running and the idle is high. I plan on cutting back on all the emissions lines to the bare minimum for proper operation, and I am bypassing the EGR entirely. has anyone done this and have a diagram or advice? I don't know much about these motors yet, but I know enough to start with the help of YouTube university. But I am completely lost with these vacuum lines.

 

[Tiha]

So 84 has a carb? I assume?

If so, just plug everything.
I think all you need is Brake booster, and HVAC controls, (which you can live without while trouble shooting) maybe Vac advance on distributor depending on what they all did to it.

I use starting fluid to check for leaks. Use carb cleaner if ya like. Spray around the base of the carb. Worn throttle shafts, warped base plates are common on rigs that people keep cobbling up like that.

 

[miesk5]

Yo Buckstalker17,
Welcome!
As Tiha advised.
Vacuum Leak Test; On an idling engine check for vacuum leaks using a mechanic's stethoscope, or a ~3' garden hose section.
On COLD ENGINE only, use propane torch w/rubber hose attached, UNLIT or spray carb cleaner, when it gets to the the leak the RPMs will rise.

Vacuum Gauge Diagnosis by Craig @ Reading your vacuum gauge
Suggest buying a vac gauge, best low cost test and MPG helper you can spend $ on;
pic; "...I have a vacuum gauge mounted right in the dash of my truck. I use it to also help determine the load my engine is under while driving, and to estimate fuel economy..."
Source: by William T at http://www.fordf150.net/images/mytruck/vacgauge.jpg
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Here's the 1984 Bronco EVTM, Emissions, Body/Chassis, Engine and Pre-Delivery Manuals @ Bronco
Scroll down to "or continue to website" and click.
Suggest downloading all.

Partial Bronco 1984 EVTM by Ford via Gary

1984 Bronco Dealer Brochure by Ford via Gary @ 1984 Bronco

1984 Owner Guide by Ford via Gary

1984 Ford Trucks Brochure by Ford via Gary

1984 Light Truck Data Book by Ford via Gary

1984 Exterior Colors by Ford via Gary

Ford 1980-86 Pickup Fasteners by Ford via Gary

Carburetors, Chokes, & EFI - ???Gary's Garagemahal by Ford via Gary

Haynes Red Manual for 80-95 Bronco & F Series @ Hanes guide 80-96 bko f series.pdf via BroncMom

 

[miesk5]

Yo Buck,
Sorry for not completing my post, needed an eye rest
Here is a vacuum diagram for a 351W from a pickup. It is the same for the Bronco minus one of the Purge CV hookups. The second diagram is a picture of hookup without the air pump.



Next up to bat is;
Typical vacuum Diagram by Ford that helps no one;

 

[miesk5]

Yo Buck,
Vacuum Line Routing Diagram in a 84 5.8 w/Auto Transmission by Ford via the real good Chilton crew before they cut knowledgeable employees to make more $ for the executives;


See it here in event image disappears. http://content.chiltonsonline.com/content/images/8576/images/85764176L.gif
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Legend (not nec. for your year/engine);
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
ACT: Air Charge Temperature Sensor, prior to 1992
ACTS: Air Cleaner Temperature Sensor
ACV: Air Control Valve
AIR: Thermactor, short for Thermal Reactor. CA vehicles are installed with it as standard. Air Injection Reaction is what it stands for.
AIR BPV: AIR BPV is the AIR Bypass (AIRB) Valve; also called the TAB (Thermactor Air Bypass) Valve
BV: Bowl Vent (on top of the float tanks)
CARB: Carburetor
CBD: Closed Bowl Distributor
CPRV: Canister Purge Valve
DIST: Distributor
DPFE: Differential Pressure Feedback
DV-TW:Two Way Delay Valve
EFCA: Electronic Fuel Control Assembly/ (Fuel Pressure Regulator (FPR)
EGR: Exhaust Gas Recirculation
EGRC/EGRV: EGR Vent/EGR Control
EXH HCV: Exhaust Heat Control Valve
EVP: EGR Valve Position
EGR: Valve Position
EVR: EGR Vacuum Regulator; also called EGR Vacuum Solenoid
FLTR: Filter
FPR: Fuel Pressure Regulator (check vacuum line)
HEAT VLV INT: Heat Vacuum Control Valve Intake, (next to carb)
HICV: Hot Idle Control Valve
IAT: Intake Air Temperature Sensor (Air Charge Temperature (ACT), prior to 1992
IVV: Thermactor Idle Vacuum Valve
LCV: EGR Load Control
MAN VAC: Manifold vacuum-Vacuum source; usually ref. to as Vacuum Tree atop intake manifold]
MAP: Manifold Absolute Pressure
PCV: Positive Crankcase Ventilation
PURGE: Vapor Canister Purge Valve
PV: Ported Vacuum
PVS: Ported Vacuum Switch (PVS) Valve
S: Spark port
SA-FV: Separator Assembly Fuel/Vacuum
SOLV: Thermactor Solenoid Valve
SV CBV: Carborator Fuel Bowl Solenoid Vent Valve
TCAC: Thermostatically Controlled Air Cleaner
TCP: Temperature Compensated Accelerator Pump
TK: Throttle Kicker
TVS: Throttle Valve Solenoid (aka Solepot, Dashpot)
or
TVS: Temperature Vacuum Switch
TVV: Thermal Vacuum Valve
or, TVV: Thermostatic Vacuum Valve (aka Ported Vacuum Switches; Thermal Vacuum Valve)
VAC: Vacuum
VCKV: Vacuum Check Valve
VCV: Vacuum Control Valve
VDV: Vacuum Delay Valve
V CK V or VCV: Vacuum Check Valve
VOTM: Vacuum Operated Throttle Modulator
VRDV: Distributor Vacuum Delay Valve (VDV, VRDV, DV-TW)
VRDV: Vacuum Delay Valve (VDV, VRDV, DV-TW)
VRESER: Vacuum Reservoir (coffee can style in earlier years; replaced by plastic style)
VRESV REST: on earlier years such as SEABRONC's 83 is a Vacuum Restictor/delay valve, it delays vacuum for a certain amount of time
VRV: Vacuum Regulator Valve
WOT: Wide Open Throttle Valve

 

[chrlsful]

"...I plan on cutting back on all the emissions lines to the bare minimum for proper operation, and I am bypassing the EGR entirely. has anyone done this..."

I'd not advise that. R U a tech who has some knowledge (& backward tech @ that)? "Micky moused" is B cuz the last guy may have had none or U have none and he did it right.
This is not some neanderthal, knuckle draggin endeavor but esp @ that transition era, very scientific and a lill esoteric. Esp dependent on carb (I have wrked on the carter BBS/BBD on ford/chryslers) and have seen them do some really great things. Redesign ur whole intake, ign, advance, carb'n ehx or ck in w/posts 3, 4, 5 and put on the long paints.