TSB 91-25-7 IAC Bypass
Repair instructions for hard cold start, hesitation, or stalls on 1985 - 1991 Ford trucks with EFI. How to install idle air by-pass control service kit F2PZ-9F939-A.
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Electrical / Climate Control / Starting / Charging
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- 87-03-07 EEC-IV Driveability TSB Summary
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Transmission/Clutch/Driveshaft/Axle
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- 82-25-16(S) Upshift Indicator Light
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- Section 1 - Emission Control ID & Application
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- Section 5 - Catalyst & Exhaust Systems
- Section 6 - EGR Systems
- Section 7 - Evaportive Emissions Systems
- Section 8 - Inlet Air Temp Systems
- Section 9 - PCV Systems
- Section 10 - Thermactor Systems
- Section 11 - Fuel Delivery Systems
- Section 12 Idle Speed Control - Vacuum Type
- Section 13 - Glossary
- Section 14 - Idle Speed Control - Electronic
- Section 15 - Ignition Systems Timing Procedures & Diagnostics
- Section 16 - Shift Indicator Light
- Section 17 - Emission Maint Warning Light Reset
- Section 18 - EEC-IV Quick Test
- Section 19 - EEC-IV Passenger Car
- Section 20 - EEC-IV Light Trucks
- Section 21 - EEC-IV Pinpoint Tests
- Section 22 - Diesel Diagnostics 2L
- Section 23 - Diesel Diagnostics 2.3L Turbo
- Section 24 - Diesel Diagnostics 6.6L
- Section 25 - Diesel Diagnostics 6.9L
- 1986 EVTM
- 1986 Ford Light Truck Accessories Brochure
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- Overhauling Diesel Engine
- Exhaust & Emission System Theory & Operation
- Basic Gasoline Engine
- Effect Of Engine Design On Emissions & Performance
- Engine Superchargers
- Basic Turbochargers
- Light Truck Rear Antilock Braking Systems
- Noise Vibration & Harshness
- Non-EEC Related Driveability Diagnosis
- Electronic Steering & Suspension Systems
- Distributorless Ignition Systems
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- Entrant #1: Dad's Truck
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- Entrant #3: Tommy Sides 1986 F150
- Entrant #4: Darth/Bill Vose
- Entrant #5: Sam Noller's 1985 Bronco
- Entrant #6: Mein Laster
- Entrant #7: Andre's Bronco
- Entrant #8: Chad's Rosebud
- Entrant #9: Matthew’s Truck of Doom
- Entrant #10: Ron's Flareside
- Entrant #11: Cory's Blue Mule
- Entrant #12: Ratdude747'S 1984 F150
- Entrant #13: Ratdude747's '95 Ranger
- Entrant #14: Heinz' 1986 F150
- Entrant #15: Anna's Toy
- Entrant #16: Frank's 1981 F-150 Custom
- Entrant # 17: Petes 1981 F150 Flareside
- Entrant #18: Eric's F250 XLT Lariat
- Entrant #19: Geejaypea's Georgian Hulk
- Entrant #20: JohnnyBronco85's Bronco
- Entrant #21: Skaeke's 1985 F150 Lariat
- Entrant #22: Sam1982's F100
- Entrant #23: NostraDanus' 1986 Bronco
- Entrant #24: MarkF100's F100
- Entrant #25: Bruce moose4x4's 1996 Bronco
- Entrant #26: Bruce Mooose4x4's 1995 F150
- Entrant #27: Troy/66gtk's 1983 F150 XL SWB 4x2
- Entrant #28: Matt Wood's 1985 Bronco
- Entrant #29: WelderScott's '78 F150
- Entrant #30: Mehmetcelikel's Brownie Dually
- Entrant #31: Kristopherdb's 1985 Flairside 4x4
- Entrant #32: Clifton's Tessa
- Entrant #33: BinFord's Beverly
- Entrant #34: BinFord's Crackling Rosie
- Entrant #35: Dan aka dblohowiak's 1986 F250HD
- Entrant #36: Jonathan's 1981 F150
- Entrant #37: Jonathan's 1995 F Superduty
- Entrant #38: Jonathan's 1986 F350 short bed crew cab IDI
- Entrant #39: Brian's 1986 F250
- Entrant #40: Jay's 1986 F150
- Entrant #41: Eddie's 1981 F100 Custom
- Entrant #42: Nick & George's Brutus
- Entrant #43: Matthew's 1983 F350
- Entrant #44: Hogie's 81 F250
- Entrant #45: TontoKowalski's 1985 F150
- Entrant #46: Danny's 1982 Bronco
- Entrant #47: Greg's 1980 F150 Ranger XLT
- Entrant #48: Chris' 1982 XLS
- Entrant #49: Chris' 1985 Bronco
- Entrant #50: Ken & Kathy's 1977 F250
- Entrant #51: Ken & Kathy's 1985 Flareside
- Entrant #52: Kevin/Teach's F250 Lariat
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Wiring
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Electrical & Vacuum Troubleshooting Manuals
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- 1980 EVTM
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- 1984 EVTM
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- 1986 EVTM
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1996 EVTM
>
- Index
- Charging System
- Daytime Running Lamps
- Engine Control - 4.9L
- Engine Control - 5.0L
- Engine Control - 5.8L Under 8500 GVW
- Engine Control - 5.8L Over 8500 & 7.5L EEC-IV
- Engine Control - 7.5L EEC-V
- Engine Control - Turbo Diesel
- Fuse Panel & Circuit Protection
- Grounds
- How To Use This Manual
- Ignition System
- Keyless Entry
- Power Distribution
- Speed Control
- 1996 Power Windows
- Starting System
- Transmission Control - 4R70W
- Transmission Control - E4OD
- Terminals & Connectors
- Wiring Connectors
- Wiring Diagrams >
- Standard Wire & Color Codes
- Standard Wire & Color Codes
- Wiring Harnesses
- Wire Routing
-
Electrical & Vacuum Troubleshooting Manuals
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- Emissions >
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Engines
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Fuel & Air Systems
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Interchange
>
- Air Conditioning Interchange
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- Brake Interchange
- Carburetor Interchange
- Crankshaft Interchange
- Diesel Injector Pump Interchange
- Distributor Interchange
- Fuel Pump Interchange
- Head Interchange
- Starter Interchange
- Steering Interchange
- Window Lift Motor Interchange
- Water Pump Interchange
-
Interior
>
- Behind The Seat Storage
- Boots
- Carpet
- Dash
- Dash Cover Installation
- Doors >
- Headliner
- Horn Pads
- Insulation
- Interior Soft Trim
- Interior Trim
- Instrument Panel Name Plates
- Instrument Panel Pad
- Instrument & Radio Bezels
- Kick Panels
- Knobs
- Painting Gauge Needles
- Rear Corner Trim
- Rear View Mirror
- Salvaging Rosewood
- Seat Belts
- Seat Interchangeability
- Seats & Seat Tracks
- Sill Plates
- Steering Columns & Steering Wheels
- Sun Visors
-
Picture Galleries
>
- Reference >
-
Specifications
>
- Assembly Plants
- Axle Ratios
- Body Codes - Interior
- Build Sheet Interpretation
- Dimensions and Weights
- Interior Paint
- Calibration Codes
- Certification Label
- DSO Codes
- Electrical
- Engine Codes
- Exterior Paint Codes
- 10-01 Identification Codes
- Lubricant Specifications
- Model Codes
- Reserve Capacity
- Spring Codes
- Standard Features And Options
- Towing
- Transmission Codes
- Tape Stripe Codes >
- VIN Decoding
-
Suspension & Steering
>
-
TSB's
>
- Bullnose TSBs
- TSB Index
-
Body/Windnoise/Water Leaks/Trim
>
- 81-06-13 Bumper Guard & Tire Carrier
- 81-7-23 Seat Belts Become Too Tight
- 83-3-15 Pickup Box Alignment
- 81-06-15 Pickup Box Wood Floor Replacement
- 83-13-4 Sheet Metal Welding Procedures
- 83-16-17 Pickup Box Lean
- 83-24-18 Swing-Lock Mirror Moves
- 83-13-22 Electric Mirror Loose Glass
- 83-24-19 Mirror Head Vibration
- 87-01-18 Tool Box Mount
-
Electrical / Climate Control / Starting / Charging
>
- 80-4-13S A/C RAPID ON-OFF CYCLING OF COMPRESSOR CLUTCH
- 81-1-10 FM Radio Interference
- 81-7-24 Temperature Control Cable Too Long
- 84-24-9 Noise - Radio Ignition Buzz
- 87-03-07 EEC-IV Driveability TSB Summary
- 87-07-20 Radio Ignition Noise
- 87-21-10 EEC-IV Diagnostics
- 88-05-07 Malfunction Indicator Light Introduction
- 89-22-08 Emissions Maintenance Warning Module
- 90-25-12 Speed Control
- 96-21-04 2G Alternator Repair
-
Brakes/Steering/Suspension/Wheels
>
- 80-14-14-S STEERING
- 81-06-04 Integral Power Steering Gear
- 81-06-16 Front Wheel Grease Seal Gaskets
- 81-06-17 Rear Parking Brake Cables
- 81-2-25 REAR SUSPENSION TORQUE SPECS
- 89-19-01 Brake Noise Recap Of TSB's
- 89-25-16 Brake Ride Height Proportioning Valve
- 90-13-9 Frame Cracking At Rear Shock Mount
- 96-15-11 Frame-Rivet Replacement With Bolts
- 97-03-10 Frame Creaking/Popping
- Steering Gear Frame Liner
- Engine/Cooling System/Exhaust >
-
Transmission/Clutch/Driveshaft/Axle
>
- 81-5-15 AOD TRANSMISSION
- 81-06-18 Clutch Housing Fills w/Mud/Dirt
- 81-07-25 Clutch Shudder/Chatter In Reverse
- 81-7-26 Missing Shims On SROD
- 82-25-16(S) Upshift Indicator Light
- 83-3-23 Axle Lubricant Drain And Refill
- 83-23-17 8.8" Rear Axle Vent
- 84-24-13 Transfer Case - Grinding/Block-Out
- 90-16-07 High Clutch Effort
- 97-13-22 Noise Or Vibration With Hubs Locked
- Driveability/Fuel/Ignition/Emissions >
- Noise/Vibration/Ride/Squeaks/Rattles >
- Miscellaneous/General >
- Health/Safety/Environmental Hazard information
- CALIBRATION: 4-53F-R00
- Fuel Cross-Flow
- Underhood >
- Vacuum Systems >
- Metrics
- About Me/Contact Me >
- Year-To-Year Differences >
- Test Page
- 91-6-7 Sterling 10.25 Hub Leaks
-
Legacy Library
- Library Overview
- Index & Contents
-
1980 Literature
>
- 1980 Light Truck Facts Book
- 1980 Explorer Program
- 1980 EVTM
- 1980 Accessories
- 1980 Bronco
- 1980 Free Wheelin' Fords
- 1980 Interior & Exterior Colors
- 1980 Light Truck Roadability Diagnosis Guide
- 1980 Owner's Guide
- 1980 Truck Service Highlights - Chassis
- 1980 Truck Service Highlights - Electrical
- 1980 Service Highlights - Climate Conrol
- 1980 Service Highlights - Front Axle, Steering, & Suspension
- 1980 Light Truck Exterior Colors
- 1980 Ford Recreational Vehicles
- 1980 Pickup Brochure
- 1980 4-Wheeler Brochure
- 1980 Engine, Emission & Related Systems
- 1981 Literature >
-
1982 Literature
>
- 1983 Literature >
-
1984 Literature
>
-
1985 Literature
>
- 1985 EVTM
- 1985 Body Builders
- 1985 Bronco
- 1985 Rapid-Spec Price List
- 1985 Explorer
- 1985 Explorer Program
- 1985 Early F-Series Pickup
- 1985 Late F-Series Pickup
- 1985 Ford Trucks
- 1985 Operating Guide
- 1985 Owner Guide
- 1985 Diesel Owner Guide Supplement
- 1985 Exterior Colors
- 1985 Carb & Fuel System Specs
- 1985 Literature - Pictoral
-
1986 Literature
>
- 1986 4-Wheeling With Ford
- 1986 Explorer Program
-
1986 Engine & Emissions Diagnosis
>
- Section 1 - Emission Control ID & Application
- Section 2 - Diagnostic Routines
- Section 3 - Emission Related Components
- Section 4 - Carbs - Fuel Charging - Throttle Bodies
- Section 5 - Catalyst & Exhaust Systems
- Section 6 - EGR Systems
- Section 7 - Evaportive Emissions Systems
- Section 8 - Inlet Air Temp Systems
- Section 9 - PCV Systems
- Section 10 - Thermactor Systems
- Section 11 - Fuel Delivery Systems
- Section 12 Idle Speed Control - Vacuum Type
- Section 13 - Glossary
- Section 14 - Idle Speed Control - Electronic
- Section 15 - Ignition Systems Timing Procedures & Diagnostics
- Section 16 - Shift Indicator Light
- Section 17 - Emission Maint Warning Light Reset
- Section 18 - EEC-IV Quick Test
- Section 19 - EEC-IV Passenger Car
- Section 20 - EEC-IV Light Trucks
- Section 21 - EEC-IV Pinpoint Tests
- Section 22 - Diesel Diagnostics 2L
- Section 23 - Diesel Diagnostics 2.3L Turbo
- Section 24 - Diesel Diagnostics 6.6L
- Section 25 - Diesel Diagnostics 6.9L
- 1986 EVTM
- 1986 Ford Light Truck Accessories Brochure
- 1986 Color & Trim Selection Options
- 1986 F-Series Pickups
- 1986 Operating Guide
- 1986 Ford Trucks
- 1986 Trailer Towing Guide
- 1986 Rapid-Spec Pricing
- 1986 Maintenance Schedule
- 1986 Owner Guide
- 1986 Exterior Colors
- Standard & Utility Parts Catalog
-
Training Manuals
>
- Ignition System Theory & Operation
- Gasoline Engine Operations
- Air Inlet Control Systems
- Electronic Fuel Injection
- Electronic Fuel Injection - Operation & Diagnosis
- Electrical Systems
- Automotive Electrical Systems Review
- Automotive Measuring Devices & Systems
- Fastening Devices & Torquing Techniques
- Automatic Overdrive Transmission
- Fuel & Air Inlet System Theory & Operation
- 6.9L Diesel Engine
- Overhauling Diesel Engine
- Exhaust & Emission System Theory & Operation
- Basic Gasoline Engine
- Effect Of Engine Design On Emissions & Performance
- Engine Superchargers
- Basic Turbochargers
- Light Truck Rear Antilock Braking Systems
- Noise Vibration & Harshness
- Non-EEC Related Driveability Diagnosis
- Electronic Steering & Suspension Systems
- Distributorless Ignition Systems
- Compressor & Clutch Overhaul - Dealer Installed AC Systems
- EEC-IV Sensors & Actuators
- Microprocessor Control Unit Systems
- TOD & SROD Four-Speed Manual Transmissions
-
Miscellaneous Literature
>
- About
-
Truck Shows
- 2017 Truck Show
- 2018 Truck Show
- 2019 Truck Show
-
2020 Truck Show
>
- Entrant #1: Dad's Truck
- Entrant #2: Big Blue
- Entrant #3: Tommy Sides 1986 F150
- Entrant #4: Darth/Bill Vose
- Entrant #5: Sam Noller's 1985 Bronco
- Entrant #6: Mein Laster
- Entrant #7: Andre's Bronco
- Entrant #8: Chad's Rosebud
- Entrant #9: Matthew’s Truck of Doom
- Entrant #10: Ron's Flareside
- Entrant #11: Cory's Blue Mule
- Entrant #12: Ratdude747'S 1984 F150
- Entrant #13: Ratdude747's '95 Ranger
- Entrant #14: Heinz' 1986 F150
- Entrant #15: Anna's Toy
- Entrant #16: Frank's 1981 F-150 Custom
- Entrant # 17: Petes 1981 F150 Flareside
- Entrant #18: Eric's F250 XLT Lariat
- Entrant #19: Geejaypea's Georgian Hulk
- Entrant #20: JohnnyBronco85's Bronco
- Entrant #21: Skaeke's 1985 F150 Lariat
- Entrant #22: Sam1982's F100
- Entrant #23: NostraDanus' 1986 Bronco
- Entrant #24: MarkF100's F100
- Entrant #25: Bruce moose4x4's 1996 Bronco
- Entrant #26: Bruce Mooose4x4's 1995 F150
- Entrant #27: Troy/66gtk's 1983 F150 XL SWB 4x2
- Entrant #28: Matt Wood's 1985 Bronco
- Entrant #29: WelderScott's '78 F150
- Entrant #30: Mehmetcelikel's Brownie Dually
- Entrant #31: Kristopherdb's 1985 Flairside 4x4
- Entrant #32: Clifton's Tessa
- Entrant #33: BinFord's Beverly
- Entrant #34: BinFord's Crackling Rosie
- Entrant #35: Dan aka dblohowiak's 1986 F250HD
- Entrant #36: Jonathan's 1981 F150
- Entrant #37: Jonathan's 1995 F Superduty
- Entrant #38: Jonathan's 1986 F350 short bed crew cab IDI
- Entrant #39: Brian's 1986 F250
- Entrant #40: Jay's 1986 F150
- Entrant #41: Eddie's 1981 F100 Custom
- Entrant #42: Nick & George's Brutus
- Entrant #43: Matthew's 1983 F350
- Entrant #44: Hogie's 81 F250
- Entrant #45: TontoKowalski's 1985 F150
- Entrant #46: Danny's 1982 Bronco
- Entrant #47: Greg's 1980 F150 Ranger XLT
- Entrant #48: Chris' 1982 XLS
- Entrant #49: Chris' 1985 Bronco
- Entrant #50: Ken & Kathy's 1977 F250
- Entrant #51: Ken & Kathy's 1985 Flareside
- Entrant #52: Kevin/Teach's F250 Lariat
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