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86 Bronco 351 H/O stock carb vacuum line hook-up


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#1 lilamadoslilamados lilamad

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Posted 10 September 2012 - 07:28 PM

I recently acquired my 86 bronco w/ a 351 Windsor high output with what seems to be a stock autolite 4 barrel carb. I don't quite understand how to read the vacuum chart and not sure where all my lines should hook up. I noticed that on the air filter housing there are 5 places for what seems to be vacuum lines, but not sure which ones go there, and also I believe it is the PCV valves that are capped off. Can anyone help me with understanding where all the line hook up and how to read the chart?

#2 Rons beast

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Posted 11 September 2012 - 10:38 AM

Hey lil,
Welcome,

The pcv valve should have a line by itself to an engine vacuum port about 3/8" at the base of the rear of the carb.
You only have 1 pvc. For the rest, a pic, or 2 of what you have under your hood would help us alot.
A Bronc that old would likely have something cobbled by past owners and that may be why things are so confusing to you.
Im sure someone else on here has a vac diagram, ( M5, Bully, Krafty, Seabronc, Neb, Adam, others )
But if it doesn't match what you are looking at again it won't be much help.

Edited by Rons beast, 11 September 2012 - 01:04 PM.

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#3 miesk5

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Posted 13 September 2012 - 11:51 AM

yo,
I can't view that URL

Maybe this will help;
Diagram in a 85-86 5.8 Carbureted
Source: by Chilton http://content.chilt...s/85764183L.gif


acronyms (not nec. for your year/engine); I compiled this from info provided here in da Zone and elsewhere, by SEABRONC and myself

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 carb 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
INT HCV: Heat Vacuum Control Valve Intake
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 or Pressure Vacuum
PVS: Ported Vacuum Switch (PVS) Valve
S: Spark port
SA-FV: Separator Assembly Fuel/Vacuum
SOL V: 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
v-cbv: Vacuum Control Bowl Vent port off of the carburetor
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
96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
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#4 miesk5

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Posted 14 September 2012 - 04:56 AM

yo,


Some info on the components shown in the vcuum diagram;

Fuel Bowl Vent Valve Depiction; "...The vent valve is a temperature actuated valve inserted in the carburetor-tocanister vent line. This valve is closed when the engine compartment is cold preventing fuel tank vapors from being vented through the carburetor fuel bowl, forcing them instead into the carbon canister..." - 80.6 MB pdf

AIR BPV: AIR BPV is the AIR Bypass (AIRB) Valve; also called the TAB (Thermactor Air Bypass) Valve
By-pass valves are part of the thermactor system and act to vent air from the air pump into the atmosphere or exhaust
system. Valves may be remote (in-line) or mounted on the air pump.

Air Control Valve
(Secondary Air Injection By-Pass Valve)The air control valve directs air pump output upstream to the exhaust manifold, or downstream to the catalyst system depending upon engine control strategy. This valve attaches to the lines from the air pump


The PCV valve controls the recirculation of blow-bygases from the engine crankcase,venting these gasesinto the intake manifold for combustion.



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

What Carb is in there?

If 2150 see this 2V Parts Break-Out Diagram; Used on Various V 8 & V 6
Posted Image
Source: by Northernguy at SuperMotors.net
this diagram shows TCP: Temperature Compensated Accelerator Pump
96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
THANKS to ALL WHO SERVE!

#5 lilamadoslilamados lilamad

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Posted 15 September 2012 - 11:42 AM

It looks like the stock motor craft Holley 4180 I believe. I'm not familiar with what most of the components look like but I have been chasing lines trying to figure out where each should go. Do you know by chance how to load pictures?

#6 Seabronc

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Posted 15 September 2012 - 01:59 PM

Here is the bare minimum hookup I would use http://www.supermoto...ry/media/672883 Here is one from a 351 HO with dual gas tanks http://www.supermoto.../media/276766_1 . A truck without dual gas tanks would only have half of the hardware shown at the bottom left. A key connection will be to the distributor, On a stock 4081 that is the port at the top of the carb just above the choke hardware. The two bowl vents should hook to the carbon canister hardware shown at the bottom left of the diagram.

Use the full editor to upload pictures and size them at about 900 X 675 so they will fit on the computer screen. Any larger than that makes them almost useless and takes for ever to display on a slow internet connection.

Good luck,

Posted Image
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