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FORD BRONCO
-> EMISSION; EGR, PCV, catalytic converter....
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WELCOME to MIESK5's BIG BRONCO LINKS
This is a Ford Bronco, Truck & Van Technical, Parts & Vehicle Classifieds LINKS site developed by the MIESK5 Family and is not affiliated with the Ford Motor Company in any manner.
Although we initially developed this site for 78-96 Big Broncos, information in many Links also applies to Ford Trucks, Vans & Cars.
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1978-1979 Emission Differences
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Air Injection (AIR), Secondary Air Injection; Pump (Smog Pump), Thermactor Air Bypass (TAB) & Thermactor Air Diverter (TAD) Solenoids; Diverter, Check & Bypass Valves, Cross-Over Tube, etc.
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Calibration Information
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Catalytic Converter
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Diagnostic Trouble Codes
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Emission Light - Emission Maintenance Warning (EMW) & Inferred Mileage Sensor/Extended Useful Life Module (IMS-EUL)
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Emission Parts Catalog, Ford
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Evaporative System - Canister Purge Solenoid Valve used in EEC IV, Carbon Canister (Charcoal Canister, Vapor Canister, Evaporative Emission (EVAP) Canister & Vapor Management Valve; miesk5 note; for OBD II, The vapor management valve (VMV) replaces the canister purge valve used in EEC IV; miesk5 note the Vapor Management Valve is located on passenger side firewall, high in our 96 5.0L
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Exhaust Gas Re-circulation (EGR) System - Differential Pressure Feedback (DPFE), EGR Vacuum Regulator (EVR), EGR Vacuum Reservoir, EGR Valve Position (EVP), EGR Tube, EGR Valve
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General Information
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Oxygen (O2) Sensor
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Positive Crankcase Ventilation (PCV)
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Standardization of All Emisson Control Parts & Names TSB 92-11-7
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Vacuum Line Routing Diagrams, Acronyms & Color Codes
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Vehicle Emission Control Information (VECI), PUK (49 States) Decal, PGP (Canada) Decal
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"...Ford EGR systems "...PCM will not operate the EGR valve unless it sees: The engine warmed up to normal operating temperature. TPS at partial throttle. TPS not at Wide Open Throttle (WOT). MAP/MAF must be indicating light or moderate load. A certain amount of computer clock time has to be elapsed..."
Source: by tomco-inc.com
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"...Ford EGR systems DO NOT engage when: engine is cold; engine is at idle; engine is at WOT; At low ambient temps (water vapor from the exhaust can freeze on the throttle plate); The EVR is a "normally closed" solenoid, which means that when it is de-energized, the position of the disc allows for maximum venting to the atmosphere (resulting in negligible vacuum flow to the EGR valve)..."
Source: by rockledge.home.comcast.net
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Ford Emission Control & Alternate Fuels Overview, Chapter 3, from Ford Fuel Injection and Electronic Engine Control: How to Understand, Service and Modify, 1988-1993
Source: by Charles O. Probst via yunost.ru
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Auto Repair Reference Center Repair Manual, Mostly Chilton; many local library's offer free online access for their members; just log-in w/your library Card # and password; incl. all Broncos, & many MAKES! 1951 to 2009; some years (85-96, I believe) include: FULL Technical Service Bulletins and Recalls, Labor Hours per repair (plug in appl info); Wiring Diagrams, Vacuum Diagrams (in DRIVEABILITY AND EMISSIONS CONTROLS Section), Specifications (torques, etc.) & Maintenance Intervals
Source: by arrc.epnet.com
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Calif Smog Mods in an 89; "...helping people get modified broncos thru California smog...Magnaflow® #93519 catalytic converter with air hookup and 3" inlet/outlet & Flowmaster™ Y...about the only cat that will work in a Bronco because it was designed to replace 2 cat systems in one converter AND is CARB approved..." read more
Source: by Andrew K (Andy351, das panzer, sloppy seconds, the magic carpet) at SuperMotors.net
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Calif Smog Mods in an 89; "...helping people get modified broncos thru California smog...Magnaflow® #93519 catalytic converter with air hookup and 3" inlet/outlet & Flowmaster™ Y...about the only cat that will work in a Bronco because it was designed to replace 2 cat systems in one converter AND is CARB approved...; read more because, by DNBELOWBRONCO, as of 1/01/2009, on the Magnaflow site you posted, that 96' & up vehicles can no longer combine two stock cats into one free flowing one. It shows that the new converters need to have all this visable from 5' away too..."
Source: by Andrew K (Andy351, das panzer, sloppy seconds, the magic carpet) at FSB
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California Air Resources Board & Federal EPA Overview
Source: boss (bossind, Steve) at FSB
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Chilton Manual for 66 - 81 Bronco, Scanned Copy
Source: by Chilton via broncocity.com
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Component Location pic in an 88 F 150
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
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Diagnosis & Troubleshooting, Chapter 10, from Ford Fuel Injection and Electronic Engine Control: How to Understand, Service and Modify, 1988-1993
Source: by Charles O. Probst via yunost.ru
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EEC IV Pin-Outs in 88-89 & 90-91 Bronco 4.9; 88-90, 91 & 92-93 Bronco 5.0; 88-91 & 92-93 Bronco 5.8; Looking Into Harness Connectors in Ford Electronic Engine Control Overview, Chapter 12, of Ford Fuel Injection and Electronic Engine Control: How to Understand, Service and Modify, 1988-1993
Source: by Charles O. Probst via yunost.ru
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EEC IV Strategies
Source: by Ford via miesk5 at broncolinks.com/gallery
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Engine Swap Fact Sheet
Source: by EPA
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Overview, Chapter 6, from Ford Fuel Injection and Electronic Engine Control: How to Understand, Service and Modify, 1988-1993
Source: by Charles O. Probst via yunost.ru
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Repair Locations Grid & Coding, Bronco; used to pin-point location of a repair or component in a vehicle
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
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Testing Wiring with a Multi Meter, General; Opens, Short, Voltage & Voltage Drop, Continuity & Diodes
Source: by freeautomechanic.com
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Vacuum Diagrams & Emission System Parts Location in a 78 400M
Source: by 78brncoxlt at SuperMotors.net
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Vacuum Leak Test; On an idling engine check for vacuum leaks using a mechanic's stethoscope with the probe removed, or a ~3' garden hose section. Don't spray flammables on a running engine. MIESK5 NOTE; Also check: vacuum hoses; intake manifold gasket & throttle body; PCV line; vacuum reservoirs: EGR Sys Vacuum Tank & 2ndry air (coffee can); AC, heater, defroster, vent control ckt & vacuum tank (plastic ball type), under dash & lines to heat/blend/etc. doors; power brake booster; cruise control ckt, etc.... where applicable; (combined w/ Steve83's info, thnx) BEWARE OF BELTS/PULLEYS, FAN AND HOT ENGINE
Source: by miesk5 & Steve83 at Ford Bronco Zone Forums
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Wiring Diagrams (Partial, Bronco similar) for F 150 in 86, 89, 91 & 95; EEC, Start/Ignition, EFI/Fuel System, Emissions, E4OD, AOD/C6 (+ clutch interlock switch), etc. from Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Ford via Ryan M (Fireguy50) at fordfuelinjection.com
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